One verse

Srimad Bhagavatam 12.7.8

12.7.8

पुराणलक्षणं ब्रह्मन् ब्रह्मर्षिभिर्निरूपितम् । श‍ृणुष्व बुद्धिमाश्रित्य वेदशास्त्रानुसारत: ॥ ८ ॥

purāṇa-lakṣaṇaṁ brahman brahmarṣibhir nirūpitam śṛṇuṣva buddhim āśritya veda-śāstrānusārataḥ

purāṇa-lakṣaṇam
the characteristics of a Purāṇa
brahman
O brāhmaṇa, Śaunaka
brahma-ṛṣibhiḥ
by great learned brāhmaṇas
nirūpitam
ascertained
śṛṇuṣva
please hear
buddhim
intelligence
āśritya
resorting to
veda-śāstra
the Vedic scriptures
anusārataḥ
in accordance with

O Śaunaka, please hear with attention the characteristics of a Purāṇa, which have been defined by the most eminent learned brāhmaṇas in accordance with Vedic literature.