Srimad Bhagavatam

References to text SB 1.5.20
SB 1.5.20: The Supreme Lord Personality of Godhead is Himself this cosmos, and still He is aloof from it. From Him only has this cosmic manifestation emanated, in Him it rests, and unto Him it enters after annihilation. Your good self knows all about this. I have given only a synopsis.

Text
“The Vedic sound vibration oṁkāra, the principal word in the Vedic literatures, is the basis of all Vedic vibrations. Therefore one should accept oṁkāra as the sound representation of the Supreme Personality of Godhead and the reservoir of the cosmic manifestation.
Lord Caitanya in Five Features
CC 1.7.128
“The personal features of the Supreme Personality of Godhead are categorized in three cases — namely ablative, instrumental and locative.”
The Liberation of Sarvabhauma Bhattacarya
CC 2.6.144