Śatapatha Brāhmaṇa ("of a hundred paths") 4.2.1.9

4.2.1.9

imāṃ tveva śukrasya purorucaṃ kuryāt | tam pratnathā pūrvathā viśvathemathā jyeṣṭhatātim barhiṣadaṃ svarvidamityattā hyetamanvattā hi jyeṣṭhastasmādāha jyeṣṭhatātim barhiṣadaṃ svarvidam pratīcīnaṃ vṛjanaṃ dohase dhunimāśuṃ jayantamanu yāsu vardhase upayāmagṛhīto 'si śaṇḍāya tvaiṣa te yonirvīratām pāhīti yādayatyattā hyetamanvattā hi vīrastasmādāhaiṣa te yonirvīratām pāhīti dakṣiṇārdhe sādayatyetāṃ hyeṣa diśamanu saṃcarati

But let him make this one the puroruk formula of the Sukra (Vâg. S. VII, 12; Rig-veda V, 44, I), 'In the olden way, in the former way, in every way, in this way (drawest thou) supremacy from him, the barhis-seated, and the bliss-attaining,'--for the eater corresponds to this (Sukra cup), and the eater is supreme hence he says, 'Supremacy from him, the barhis-seated, bliss-attaining,'--and onward strength drawest thou from him, the roaring, the swift, that winneth those through which thou waxest strong.--Thou art taken with a support: thee for Sanda!'--With 'This is thy womb: protect manhood!' he deposits (the cup); for to this one corresponds the eater, and the man (hero) is the eater: hence he says, 'This is thy womb: protect manhood!' He deposits it on the south part (of the mount), for it is in that direction that yonder (sun) moves.