Kauṣītaki (Śāṅkhāyana) Brāhmaṇa 2.3.20

2.3.20

atha yat srucam nirleḍhi /

(he rubs) the second time, he lays down his outstretched hand to the south of the mat; thereby he delights the fathers. In that he twice eats by means of his forefinger, with the first he delights foetuses; therefore though not eating, foetuses draw breath; with the second birds; therefore birds eat very multifarious matter as it were, but exude what is white as it were. In that he eats with the offering ladle, thereby he delights what has been and what will be. In that he licks the offering ladle, thereby he delights the serpents, the god folk. In that he cleanses the offering ladle, thereby he delights the Rakṣases, the god folk. In that he pours forth the waters to east and north, thereby he delights the Gandharvas and the Apsarases. In that he directs the offering ladle to east and north, verily thus he places Rudra in his own quarter; thus with the Agnihotra he delights all creatures.