Deuteronomy 15:19-23 - Consecration Of Firstborn Animals
19 All the firstborn males that come of thy herd and of thy flock thou shalt sanctify unto the LORD thy God; thou shalt do no work with the firstborn of thy bullock nor shear the firstborn of thy sheep. 20 Thou shalt eat it before the LORD thy God each year in the place which the LORD shall choose, thou and thy household. 21 And if there is any blemish in it, if it is lame or blind or has any ill blemish, thou shalt not sacrifice it unto the LORD thy God. 22 Thou shalt eat it within thy gates; the unclean and the clean person shall eat it alike, as the roebuck and as the hart. 23 Only thou shalt not eat the blood thereof; thou shalt pour it upon the ground as water.