Kautilya's Arthashastra 3.14.37

3.14.37

anāhitāgniḥ śataguruyajvā ca sahasraguḥ /
surāpo vṛṣalībhartā brahmahā gurutalpagaḥ //

If the sacrificer himself (he who has instituted the sacrifice) dies, then the remaining priests shall complete the sacrifice and carry away the presents. If a sacrificer sends out any priest before completing the sacrifice, he shall be punished with the first amercement. If a sacrificer sending out a priest happens to be a person who has not kept the sacrificial fire, or to be a preceptor or one who has already performed sacrifices, then the fines shall be 100, 1000, and 1000 panas respectively.

As it is certain that sacrificial merits fall in value when performed in company with a drunkard, the husband of a Súdra woman, a murderer of a Bráhman, or one who has violated the chastify of the wife of his preceptor, a receiver of condemnable gifts, or is a thief, or one whose performance of sacrificial acts is condemnable, it is no offence to send out such a priest.