CC Ādi 2.59

ei śloka tattva-lakṣaṇa bhāgavata-sāra
paribhāṣā-rūpe ihāra sarvatrādhikāra
Word for word: 
ei — this; śloka — verse; tattva — the truth; lakṣaṇa — indicating; bhāgavata — of Śrīmad-Bhāgavatam; sāra — the essence; paribhāṣā — of synonyms; rūpe — in the form; ihāra — of this (Śrīmad-Bhāgavatam); sarvatra — everywhere; adhikāra — jurisdiction.
Translation: 
The truth indicated in this verse [text 30] is the essence of Śrīmad-Bhāgavatam. This conclusion, through synonyms, applies everywhere.