Śatapatha Brāhmaṇa ("of a hundred paths") 3.2.1.14

3.2.1.14

tām pariharate | ūrgasyāṅgirasītyaṅgiraso hyetāmūrjamapaśyannūrṇamradā ūrjam mayi dhehīti nātra tirohitamivāsti

He girds himself with it, with the text (Vâg. S. IV, 10), 'Thou art the strength of the Aṅgiras,'--for the Aṅgiras perceived this (source of) strength; 'soft as wool, bestow thou strength on me!' there is nothing obscure in this.