Skandapurana 5.216.8

5.216.8

tadabhāve gṛhasthāṃśca
brahmajñānaparāyaṇān.. agnihotraparānviprānvedavidyāvicakṣaṇān..8..

in their absence, householders devoted to the knowledge of Brahman, / brahmins devoted to the agnihotra, and those proficient in the learning of the Vedas;