Atharvaveda 12.3.2

12.3.2

tā́vad vāṃ cákṣus táti vīryā̀ṇi tā́vat téjas tatidhā́ vā́jināni |
agníḥ śárīraṃ sacate yadáidho 'dhā pakvā́n mithunā sáṃ bhavāthaḥ ||2||

So much [be] your sight, so many your powers (vīryà), so great your brilliancy (téjas), so many-fold your energies (vā́jina); Agni fastens on (sac) the body when [it is his] fuel (?); then, O paired ones (mithuná), shall ye come into being from what is cooked (pakvá).