CC Madhya 20.154

īśvaraḥ paramaḥ kṛṣṇaḥ
sac-cid-ānanda-vigrahaḥ
anādir ādir govindaḥ
sarva-kāraṇa-kāraṇam
Synonyms: 
īśvaraḥ — the controller; paramaḥ — supreme; kṛṣṇaḥ — Lord Kṛṣṇa; sat — eternal existence; cit — absolute knowledge; ānanda — absolute bliss; vigrahaḥ — whose form; anādiḥ — without beginning; ādiḥ — the origin; govindaḥ — Lord Govinda; sarva-kāraṇa-kāraṇam — the cause of all causes.
Translation: 
“ ‘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.’
Purport: 

This is the first verse of the fifth chapter of the Brahma-saṁhitā.