Śatapatha Brāhmaṇa ("of a hundred paths") 6.4.3.6

6.4.3.6

atha kṛṣṇājinaṃ ca puṣkaraparṇaṃ ca samudgṛhṇāti | yonirvai puṣkaraparṇaṃ yonyā tadretaḥ siktaṃ samudgṛhṇāti tasmādyonyā retaḥ siktaṃ samudgṛhyate sujāto jyotiṣā saha śarma varūthamāsadatsvariti sujāto hyeṣa jyotiṣā saha śarma caitadvarūthaṃ ca svaścāsīdati

He then takes up together the black antelope skin and the lotus-leaf; for the lotus-leaf is the womb, and with the womb he takes up that infused seed: whence the infused seed is taken up by the womb. [He does so, with, Vâg. S. XI, 40] 'Wellborn with splendour, the refuge and shelter, hath he settled down in the light;' for well-born he is, and he settles down in the refuge, and shelter, and light.