Aitareyabrahmana 3.2.p9

3.2.p9

iii. 15 (xii. 4). Indra having slain Vṛtra, thinking 'I have not laid (him) low', went to the further distances; to the very furthest distance he went; the very furthest distance is the Anuṣṭubh; the Anuṣṭubh is speech. He, having entered speech, lay there; him all creatures severally searched for. Him on the previous day the fathers found, on the second day the gods. Therefore on the previous day is offering made to the fathers, on the second day they sacrifice to the gods. They said, 'Let us press; so assuredly most quickly will he come to us.' They pressed; with 'Thee like a car for aid' they turned him towards (them); at (the verse ) praising the pressed (drink), 'This drink, O bright one, is pressed' he became revealed to them. With 'O Indra, come nearer' they brought him into the midst; with a sacrifice to which Indra has come he sacrifices, with a sacrifice possessing Indra he prospers, who knows thus.