Vyasasmriti 1.22

1.22

evaṃ dvijātimāpanno vimukto vālyadoṣataḥ
śrutismṛtipurāṇānāṃ bhavedadhyayanakṣamaḥ

Having thus attained the status of twice-born and being freed from the impurities of childhood,
he becomes competent for the study of the revealed scripture, the remembered tradition, and the Purāṇas.