Deuteronomy 15:18-20 Amplified Bible (AMP)
18 “It shall not seem hard to you when you set him free, for he has served you six years with double the service of a hired man; so the Lord your God will bless you in everything you do.
19 “You shall consecrate (set apart) to the Lord your God all the firstborn males that are born of your herd and flock. You shall not work with the firstborn of your herd, nor shear the firstborn of your flock. 20 You and your household shall eat it every year before the Lord your God in the place [for worship] which the Lord chooses.
Deuteronomy 15:18-20 New International Version (NIV)
18 Do not consider it a hardship to set your servant free, because their service to you these six years has been worth twice as much as that of a hired hand. And the Lord your God will bless you in everything you do.
The Firstborn Animals
19 Set apart for the Lord your God every firstborn male of your herds and flocks. Do not put the firstborn of your cows to work, and do not shear the firstborn of your sheep. 20 Each year you and your family are to eat them in the presence of the Lord your God at the place he will choose.