Śatapatha Brāhmaṇa ("of a hundred paths") 4.3.3.18

4.3.3.18

athāto gṛhṇātyeva | mahāṃ indro nṛvadā carṣaṇiprā uta dvibarhā aminaḥ sahobhiḥ asmadryagvāvṛdhe vīryāyoruḥ pṛthuḥ sukṛtaḥ kartṛbhirbhūt upayāmagṛhīto 'si mahendrāya tvaiṣa te yonirmahendrāya tveti sādayati mahendrāya hyenaṃ gṛhṇāti

He thus draws it from that (Dronakalasa or Pûtabhrit), with (Vâg. S. VII, 39; Rig-veda VI, 19, 1), 'Great is Indra and hero-like, gladdening the people, of double stature and unimpaired in power. For our sake he waxed strong for heroic deed,--great and broad was he, and well-shapen by the shapers.--Thou art taken with a support: thee to Mahendra!'--with 'This is thy womb: thee to Mahendra!' he deposits it; for it is indeed for the Great Indra that he draws it.