etaṁ mantram udīrayet

sinivalyam-on the dark-moon day; mrda-with dirt; alipya-smearing the body; snayat-one should bathe; kroda-vidirnaya-dug up by the tusk of a boar; yadi-if; labhyeta-it is available; vai-indeed; srotasi-in a flowing river; etam mantram-this mantra; udirayet-one should chant.