Shatapatha Brahmana 2.6.3.17

2.6.3.17

tadu hovācāsuriḥ | kiṃ nu tatra mukhasya yadapi sarvāṇyeva lomāni vapeta yadvai triḥ saṃvatsarasya yajate tenaiva sarvatomukhastenānnādastasmānnādriyeta parivartayitumiti

And on this point Âsuri said, 'What in the world has it to do with his face, even if he were to shave off all the hair of his head! It is by offering thrice in the year that he comes to face all the quarters and becomes a consumer of food: let him therefore not trouble himself about shaving his head.'