CC Madhya 20.358

bhāgavatārambhe vyāsa maṅgalācaraṇe
‘parameśvara’ nirūpila ei dui lakṣaṇe
Word for word: 
bhāgavata-ārambhe — in the beginning of Śrīmad-Bhāgavatam; vyāsa — the great author Vyāsadeva; maṅgala-ācaraṇe — in the auspicious invocation; parama-īśvara — the Supreme Personality of Godhead; nirūpila — has described; ei dui lakṣaṇe — by these two characteristics, namely svarūpa (personal) and taṭastha (marginal) symptoms.
Translation: 
“In the auspicious invocation at the beginning of Śrīmad-Bhāgavatam, Śrīla Vyāsadeva has described the Supreme Personality of Godhead by these symptoms.