Deuteronomy 15:19-23 - Consecration Of Firstborn Animals
19 All the firstborn that come of thine oxen and of thy sheep that are males, thou shalt hallow unto the LORD thy God. Thou shalt do no service with the firstborn of thy sheep: 20 but shalt eat them before the LORD thy God year by year in the place which the LORD hath chosen, both thou and thine household. 21 If there be any deformity therein, whether it be lame or blind or whatsoever evil favouredness it hath, thou shalt not offer it unto the LORD thy God: 22 But shalt eat it in thine own city, the unclean and the clean indifferently, as the roe and the hart. 23 Only eat not the blood thereof, but pour it upon the ground as water.