Srimad-Bhagavatam: Canto 12 - Chapter 1 - Verse 42
Sanskrit:
स वै मह्यं महाराज भगवान् बादरायण: ।इमां भागवतीं प्रीत: संहितां वेदसम्मिताम् ॥ ४२ ॥
ITRANS:
sa vai mahyaṁ mahā-rājabhagavān bādarāyaṇaḥimāṁ bhāgavatīṁ prītaḥsaṁhitāṁ veda-sammitām
Translation:
My dear Mahārāja Parīkṣit, that great personality Śrīla Vyāsadeva taught me this same scripture, Śrīmad-Bhāgavatam, which is equal in stature to the four Vedas.