Śrī Caitanya Caritamrta · Text Ādi 7.138
বৃহদ্বস্তু ‘ব্রহ্ম’ কহি—‘শ্রীভগবান্’ ।
ষড়্বিধৈশ্বর্যপূর্ণ, পরতত্ত্বধাম ॥ ১৩৮ ॥
bṛhad-vastu ‘brahma’ kahi — ‘śrī-bhagavān’
ṣaḍ-vidhaiśvarya-pūrṇa, para-tattva-dhāma
“Brahman, who is greater than the greatest, is the Supreme Personality of Godhead. He is full in six opulences, and therefore He is the reservoir of ultimate truth and absolute knowledge.
Read Śrīla Prabhupāda's purport on Vedabase.io