Srimad Bhagavatam

References to text SB 10.87.18
SB 10.87.18: Among the followers of the methods set forth by great sages, those with less refined vision worship the Supreme as present in the region of the abdomen, while the Ä€ruṇis worship Him as present in the heart, in the subtle center from which all the prÄṇic channels emanate. From there, O unlimited Lord, these worshipers raise their consciousness upward to the top of the head, where they can perceive You directly. Then, passing through the top of the head toward the supreme destination, they reach that place from which they will never again fall to this world, into the mouth of death.

Text â„–
“ ‘Those who follow the path of great, saintly mystic yogÄ«s take to the yogic gymnastic process and begin worshiping from the abdomen, where it is said that Brahman is located. Such people are called Å›ÄrkarÄká¹£a, which means that they are situated in the gross bodily conception. There are also followers of the ṛṣi known as Ä€ruṇa. Following his path, they observe the activities of the arteries. Thus they gradually rise to the heart, where subtle Brahman, ParamÄtmÄ, is situated. They then worship Him. O unlimited Ananta! Better than these persons are the mystic yogÄ«s who worship You from the top of their heads. Beginning with the abdomen and proceeding through the heart, they reach the top of the head and pass through the brahma-randhra, the hole at the top of the skull. Thus these yogÄ«s attain the perfectional platform and do not enter the cycle of birth and death again.’
The Sixty-One Explanations of the Atmarama Verse
CC 2.24.166
“ ‘Those who follow the path of great, saintly mystic yogÄ«s take to the yogic gymnastic process and begin worshiping from the abdomen, where it is said that Brahman is located. Such people are called Å›ÄrkarÄká¹£a, which means that they are situated in the gross bodily conception. There are also followers of the ṛṣi known as Ä€ruṇa. Following his path, they observe the activities of the arteries. Thus they gradually rise to the heart, where subtle Brahman, ParamÄtmÄ, is situated. They then worship Him. O unlimited Ananta! Better than these persons are the mystic yogÄ«s who worship You from the top of their heads. Beginning with the abdomen and proceeding through the heart, they reach the top of the head and pass through the brahma-randhra, the hole at the top of the skull. Thus these yogÄ«s attain the perfectional platform and do not enter the cycle of birth and death again.’
The Sixty-One Explanations of the Atmarama Verse
CC 2.24.213
Chapter 16: Conclusion of Teachings to Sanatana Gosvami
Teachings of Lord Caitanya
TLC 16