Sri Brahma-Samhita

References to text BS 5.1
BS 5.1: Kṛṣṇa who is known as Govinda is the Supreme Godhead. He has an eternal blissful spiritual body. He is the origin of all. He has no other origin and He is the prime cause of all causes.

Text
“ ‘Kṛṣṇa, who is known as Govinda, is the supreme controller. He has an eternal, blissful, spiritual body. He is the origin of all. He has no other origin, for He is the prime cause of all causes.’
Talks Between Sri Caitanya Mahaprabhu and Ramananda Raya
CC 2.8.137
“The Supreme Personality of Godhead exists in three principal forms — svayaṁ-rūpa, tad-ekātma-rūpa and āveśa-rūpa.
Lord Sri Caitanya Mahaprabhu Instructs Sanatana Gosvami in the Science of the Absolute Truth
CC 2.20.165