Ashvalayanagrihyasutra 4.7-2

4.7-2

brāhmaṇām śruta śīla vṛtta sampannān ekena vā kāle jñāpitān snātān kṛta pacchaucān ācāntān udan mukhān pitṛvad upaveśya eka ekam eka ekasya dvau dvau trīṃs trīn vā./

He causes Brâhmanas who are endowed with learning, moral character, and correct conduct, or with one of these (characteristics), who have been invited in time, who have taken a bath, washed their feet, and sipped water, to sit down, as representatives of the Fathers, with their faces turned to the north, one for each one of the Fathers, or two for each, or three for each.