Śatapatha Brāhmaṇa ("of a hundred paths") 14.2.2.22

14.2.2.22

tantrāyiṇa iti eṣa vai tantrāyī ya eṣa tapatyeṣa hīmāṃlokāṃstantramivānusañcaratyeṣa u pravargyastadetamevaitatprīṇāti tasmādāha tantrāyiṇa iti

'To the web-weaver,'--the web-weaver, doubtless, is he that shines yonder, for he moves along these worlds as if along a web; and the Pravargya also is that (sun): thus it is him he thereby pleases, and therefore he says, 'To the web-weaver'--