Śatapatha Brāhmaṇa ("of a hundred paths") 4.2.1.8

4.2.1.8

imāmu haike śukrasya purorucaṃ kurvanti | ayaṃ venaścodayatpṛśnigarbhā jyotirjarāyū rajaso vimāna iti tadetasya rūpaṃ kurmo ya eṣa tapatīti yadāha jyotirjarāyuriti

Now some make this the puroruk formula of the Sukra, 'He, the longing, light-enveloped, urged the daughters of the dappled (cloud) along the measurer of the welkin,'--saying, 'We thus make it like him that burns yonder, in that he says "the light-enveloped."'