Śatapatha Brāhmaṇa ("of a hundred paths") 4.2.4.24

4.2.4.24

athāto gṛhṇātyeva | mūrdhānaṃ divo aratim pṛthivyā vaiśvānaramṛta ā jātamagnim | kaviṃ samrājamatithiṃ janānāmāsannā pātraṃ janayanta devāḥ | upayāmagṛhīto 'si dhruvo 'si dhruvakṣitirdhruvāṇāṃ dhruvatamo 'cyutānāmacyutakṣittama eṣa te yonirvaiśvānarāya tveti sādayati vyuhya na tṛṇaṃ canāntardhāya vaiśvānarāya hyenaṃ gṛhṇāti

Here now he draws it from that (stream of Soma), (Vâg. S. VII, 24; Rig-veda VI, 7, 1), 'Agni Vaisvânara, the crest of heaven, the disposer of the earth, born in the sacred rite, the wise all-ruler, the guest of men,--him the gods have begotten as a vessel for their mouth. Thou art taken with a support: thou art firm (Dhruva), of firm abode, the firmest of the firm, the most solidly founded of the solid! This is thy womb--thee for Vaisvânara!' therewith he deposits it after pushing (the dust) aside, and not leaving so much as a blade of grass between: for he indeed takes it for (Agni) Vaisvânara.