One verse

Srimad Bhagavatam 12.7.22

12.7.22

एवंलक्षणलक्ष्याणि पुराणानि पुराविद: । मुनयोऽष्टादश प्राहु: क्षुल्लकानि महान्ति च ॥ २२ ॥

evaṁ lakṣaṇa-lakṣyāṇi purāṇāni purā-vidaḥ munayo ’ṣṭādaśa prāhuḥ kṣullakāni mahānti ca

evam
in this way
lakṣaṇa-lakṣyāṇi
symptomized by their characteristics
purāṇāni
the Purāṇas
purā-vidaḥ
those who are expert in such ancient histories
munayaḥ
the sages
aṣṭādaśa
eighteen
prāhuḥ
say
kṣullakāni
minor
mahānti
great
ca
also

Sages expert in ancient histories have declared that the Purāṇas, according to their various characteristics, can be divided into eighteen major Purāṇas and eighteen secondary Purāṇas.