Deuteronomy 15
19 Ref `Every firstling that is born in thy herd and in thy flock -- the male thou dost sanctify to Jehovah thy God; thou dost not work with the firstling of thine ox, nor shear the firstling of thy flock;
20 Ref before Jehovah thy God thou dost eat it year by year, in the place which Jehovah doth choose, thou and thy house.