Śatapatha Brāhmaṇa ("of a hundred paths") 2.3.4.11

2.3.4.11

agnirmūrdhā divaḥ | kakutpatiḥ pṛthivyā ayam apāṃ retāṃsi jinvatītyanveva dhāvati tadyathā yācan kalyāṇaṃ vadedāmuṣyāyaṇo vai tvamasyalaṃ vai tvametasmā asītyevameṣā

[He continues, Vâg. S. III, 12], 'Agni, the head, the summit of the sky; he, the lord of the earth, animates the seeds of the waters.' He thereby follows (and praises) him:--even as a supplicant would speak politely, 'Surely thou art the descendant of so and so! surely thou art able to do this!' so (he does) by this (verse).