Gobhilagrihyasutra 1.8.28

1.8.28

athai 'nam adbhir abhyukṣyā 'gnāv apyarjayed yaḥ paśūnām adhipatī rudras tanticaro vṛṣā, paśūn asmākaṃ mā him̐sīr; etad astu hutaṃ tava, svāhe 'ti:

He then should besprinkle that (handful of grass) with water, and should throw it into the fire with (the verse), 'Thou who art the lord of cattle, Rudra, who walkest with the lines (of cattle), the manly one: do no harm to our cattle; let this be offered to thee! Svâhâ!