Śatapatha Brāhmaṇa ("of a hundred paths") 1.3.3.11

1.3.3.11

sa stṛṇāti | ūrṇamradasaṃ tvā stṛṇāmi svāsasthāṃ devebhya iti sādhvīṃ devebhya ityevaitadāha yadāhorṇamradasaṃ tveti svāsasthāṃ devebhya iti svāsadāṃ devebhya ityevaitadāha

He spreads it, with the text (Vâg. S. II, 2), 'I spread thee, soft as wool, pleasant to sit upon for the gods!'--when he says 'thee, soft as wool,' he thereby means to say 'agreeable to the gods;' and by 'pleasant to sit upon for the gods,' he means to say 'forming a good seat for the gods.'