Ṛgvidhāna · Chapter 2.3

vāg.indriya.pramūḍho.yo.na.vidyām.pratipadyate./
indriya.arthāny.atha.arthān.vā.yo.na.vetti.kathaṃcana.//

vidyā.vā.adhigatā.yasya.praṇaśyeta.punaḥ.punaḥ./
sasarparīr.ṛcau.japan.dvau.māsau.pratipadyate.//

anasā.samprayātas.tu.sthirau.gāvāv.iti.smaret./
catasraḥ.kuśalena.eti.siddha.arthaḥ.sthirayā.anugaḥ.//

yāna.akṣam.apabhagna.antam.dṛṣṭvā.durge.adhvani.dvijaḥ./
abhi.vyayasva.iti.japed.dvṛcam.akṣa.balam.dadhat.//

kṛṣṇa.pakṣe.caturdaśyām.tri.rātra.upoṣitaḥ.śuciḥ./
dakṣiṇa.pravaṇe.deśe.śmaśānasthaḥ.samāhitaḥ.//