Shatapatha Brahmana 11.3.1.5

11.3.1.5

tadapyete ślokāḥ kiṃ svidvidvānpravasatyagnihotrī gṛhebhyaḥ kathaṃ svidasya kāvyaṃ kathaṃ saṃtato agnibhiriti kathaṃ svidasyānapaproṣitam bhavatītyevaitadāha

Concerning this point there are also these verses:--'Knowing what, does the offerer of the Agnihotra stay away from his house? how is his wisdom (manifested)? how is he kept up by his fires?'--whereby he means to say, 'How, then, is there no staying away from home on his part?'