Śrīmad-Bhāgavatam · Text 1.4.20
Who is speaking and story frame
ऋग्यजु:सामाथर्वाख्या वेदाश्चत्वार उद्धृता: ।
इतिहासपुराणं च पञ्चमो वेद उच्यते ॥ २० ॥
ṛg-yajuḥ-sāmātharvākhyā
vedāś catvāra uddhṛtāḥ
itihāsa-purāṇaṁ ca
pañcamo veda ucyate
The four divisions of the original sources of knowledge [the Vedas] were made separately. But the historical facts and authentic stories mentioned in the Purāṇas are called the fifth Veda.
Read this verse on Vedabase.ioThis verse has no purport; its meaning is explained by the verses around it.