Bhagavad Gita As It Is

References to text BG 4.13
BG 4.13: According to the three modes of material nature and the work associated with them, the four divisions of human society are created by Me. And although I am the creator of this system, you should know that I am yet the nondoer, being unchangeable.

Text
O best among the twice-born, it is therefore concluded that the highest perfection one can achieve by discharging the duties prescribed for one’s own occupation according to caste divisions and orders of life is to please the Personality of Godhead.
Divinity and Divine Service
SB 1.2.13
At Mahārāja Yudhiṣṭhira’s inquiry, Bhīṣmadeva first defined all the classifications of castes and orders of life in terms of the individual’s qualifications. Then he systematically, in twofold divisions, described counteraction by detachment and interaction by attachment.
The Passing Away of Bhishmadeva in the Presence of Lord Krishna
SB 1.9.26
O chief of the Kuru dynasty, the Vedic wisdom became manifested from the mouth of the virāṭ, the gigantic form. Those who are inclined to this Vedic knowledge are called brāhmaṇas, and they are the natural teachers and spiritual masters of all the orders of society.
Creation of the Universal Form
SB 3.6.30
The four divisions of retired life are the vaikhānasas, vālakhilyas, audumbaras and phenapas. The four divisions of the renounced order of life are the kuṭīcakas, bahvodas, haṁsas and niṣkriyas. All these were manifested from Brahmā.
Creation of the Kumaras and Others
SB 3.12.43
The great sage Maitreya continued: O great hero Vidura, the great sages, headed by Bhṛgu, were always thinking of the welfare of the people in general. When they saw that in the absence of King Aṅga there was no one to protect the interests of the people, they understood that without a ruler the people would become independent and nonregulated.
The Story of King Vena
SB 4.14.1
A person who executes his occupational duty properly for one hundred births becomes qualified to occupy the post of Brahmā, and if he becomes more qualified, he can approach Lord Śiva. A person who is directly surrendered to Lord Kṛṣṇa, or Viṣṇu, in unalloyed devotional service is immediately promoted to the spiritual planets. Lord Śiva and other demigods attain these planets after the destruction of this material world.
Chanting the Song Sung by Lord Siva
SB 4.24.29
By the arrangement of the Supreme Lord, low-grade living beings like bugs and mosquitoes suck the blood of human beings and other animals. Such insignificant creatures are unaware that their bites are painful to the human being. However, first-class human beings — brāhmaṇas, kṣatriyas and vaiśyas — are developed in consciousness, and therefore they know how painful it is to be killed. A human being endowed with knowledge certainly commits sin if he kills or torments insignificant creatures, who have no discrimination. The Supreme Lord punishes such a man by putting him into the hell known as Andhakūpa, where he is attacked by all the birds and beasts, reptiles, mosquitoes, lice, worms, flies, and any other creatures he tormented during his life. They attack him from all sides, robbing him of the pleasure of sleep. Unable to rest, he constantly wanders about in the darkness. Thus in Andhakūpa his suffering is just like that of a creature in the lower species.
A Description of the Hellish Planets
SB 5.26.17
The shameless husbands of lowborn śūdra women live exactly like animals, and therefore they have no good behavior, cleanliness or regulated life. After death, such persons are thrown into the hell called Pūyoda, where they are put into an ocean filled with pus, stool, urine, mucus, saliva and similar things. Śūdras who could not improve themselves fall into that ocean and are forced to eat those disgusting things.
A Description of the Hellish Planets
SB 5.26.23
While I am engaged in the business of killing Lord Viṣṇu, go down to the planet earth, which is flourishing due to brahminical culture and a kṣatriya government. These people engage in austerity, sacrifice, Vedic study, regulative vows, and charity. Destroy all the people thus engaged!
Hiranyakasipu, King of the Demons
SB 7.2.10
In time of emergency, one may accept any of the various types of professions known as ṛta, amṛta, mṛta, pramṛta and satyānṛta, but one should not at any time accept the profession of a dog. The profession of uñchaśila, collecting grains from the field, is called ṛta. Collecting without begging is called amṛta, begging grains is called mṛta, tilling the ground is called pramṛta, and trade is called satyānṛta. Engaging in the service of low-grade persons, however, is called śva-vṛtti, the profession of the dogs. Specifically, brāhmaṇas and kṣatriyas should not engage in the low and abominable service of śūdras. Brāhmaṇas should be well acquainted with all the Vedic knowledge, and kṣatriyas should be well acquainted with the worship of demigods.
The Perfect Society: Four Social Classes
SB 7.11.18-20
If one shows the symptoms of being a brāhmaṇa, kṣatriya, vaiśya or śūdra, as described above, even if he has appeared in a different class, he should be accepted according to those symptoms of classification.
The Perfect Society: Four Social Classes
SB 7.11.35
Dogs, fallen persons and untouchables, including caṇḍālas [dog-eaters], should all be maintained with their proper necessities, which should be contributed by the householders. Even one’s wife at home, with whom one is most intimately attached, should be offered for the reception of guests and people in general.
Ideal Family Life
SB 7.14.11
Being pleased by the full surrender and submission of Lord Bharata, Lord Rāmacandra then accepted the throne of the state. He cared for the citizens exactly like a father, and the citizens, being fully engaged in their occupational duties of varṇa and āśrama, accepted Him as their father.
The Pastimes of the Supreme Lord, Ramacandra
SB 9.10.50
Śukadeva Gosvāmī said: O Mahārāja Parīkṣit, descendant of Mahārāja Bharata, I shall now describe the dynasty of Pūru, in which you were born, in which many saintly kings appeared, and from which many dynasties of brāhmaṇas began.
The Dynasty of Puru
SB 9.20.1
Although the demons who take possession of the government are dressed like men of government, they do not know the duty of the government. Consequently, by the arrangement of God, such demons, who possess great military strength, fight with one another, and thus the great burden of demons on the surface of the earth is reduced. The demons increase their military power by the will of the Supreme, so that their numbers will be diminished and the devotees will have a chance to advance in Kṛṣṇa consciousness.
Krishna the Supreme Personality of Godhead
SB 9.24.59
Once when mother earth was overburdened by hundreds of thousands of military phalanxes of various conceited demons dressed like kings, she approached Lord Brahmā for relief.
The Advent of Lord Krishna: Introduction
SB 10.1.17
When brāhmaṇas are free from envy, untruthfulness, unnecessary pride, grudges, disturbance by the opulence of others, and false prestige, their blessings never go in vain. Considering this, Nanda Mahārāja soberly took Kṛṣṇa on his lap and invited such truthful brāhmaṇas to perform a ritualistic ceremony according to the holy hymns of the Sāma Veda, Ṛg Veda and Yajur Veda. Then, while the hymns were being chanted, he bathed the child with water mixed with pure herbs, and after performing a fire ceremony, he sumptuously fed all the brāhmaṇas with first-class grains and other food.
The Killing of the Demon Trinavarta
SB 10.7.13-15
My lord, you are the best of the brāhmaṇas, especially because you are fully aware of the jyotiḥ-śāstra, the astrological science. Therefore you are naturally the spiritual master of every human being. This being so, since you have kindly come to my house, kindly execute the reformatory activities for my two sons.
Lord Krishna Shows the Universal Form Within His Mouth
SB 10.8.6
Nanda Mahārāja said: My dear great sage, if you think that your performing this process of purification will make Kaṁsa suspicious, then secretly chant the Vedic hymns and perform the purifying process of second birth here in the cow shed of my house, without the knowledge of anyone else, even my relatives, for this process of purification is essential.
Lord Krishna Shows the Universal Form Within His Mouth
SB 10.8.10
In accordance with the particular nature one has acquired in conditioned life, whatever one does with body, words, mind, senses, intelligence or purified consciousness one should offer to the Supreme, thinking, “This is for the pleasure of Lord Nārāyaṇa.”
Maharaja Nimi Meets the Nine Yogendras
SB 11.2.36
The Supreme Personality of Godhead said: Taking full shelter in Me, with the mind carefully fixed in the devotional service of the Lord as spoken by Me, one should live without personal desire and practice the social and occupational system called varṇāśrama.
The Nature of Fruitive Activity
SB 11.10.1
Śrī Uddhava said: My dear Lord, previously You described the principles of devotional service that are to be practiced by followers of the varṇāśrama system and even ordinary, unregulated human beings. My dear lotus-eyed Lord, now please explain to me how all human beings can achieve loving service unto You by the execution of their prescribed duties.
Lord Krishna's Description of the Varnasrama System
SB 11.17.1-2