Deuteronomy Chapter 15, Verse 19

19: All the firstling 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 firstling of thy bullock, nor shear the firstling of thy sheep.- edit KJV text
19: Of the firstlings, that come of thy herds and thy sheep, thou shalt sanctify to the Lord thy God whatsoever is of the male sex. Thou shalt not work with the firstling of a bullock, and thou shalt not shear the firstlings of thy sheep.— edit Douay text
19: Every first-born that shall be born among thy kine and thy sheep, thou shalt sanctify the males to the Lord thy God; thou shalt not work with thy first-born calf, and thou shalt not shear the first-born of thy sheep.— edit LXX text