Shatapatha Brahmana 1.5.2.20

1.5.2.20

o śrāvayeti vai devāḥ | virājamabhyājuhuvurastu śrauṣaḍiti vatsamupāvāsṛjanyajetyudajayanye yajāmaha ityupāsīdanvaṣaṭkāreṇaiva virājamaduhateyaṃ vai virāḍasyai vā eṣa doha evaṃ ha vā asmā iyaṃ virāṭsarvāṅkāmānduhe ya evametaṃ virājo dohaṃ veda

With 'O srâvaya!' the gods called the shining one (virâg, viz. cow), with 'Astu sraushat!' they untied the calf and let it go to her; with 'Yaga!' they raised (its head to the udder of the cow); with 'Ye yagâmahe!' they sat down by her (for milking); with the vashat-call they milked her. The shining one, doubtless, is this (earth), and of her this is the milking: and for him who knows this to be the milking of the shining one, this shining (earth-cow) thus milks out all his desires.