Deuteronomy 15:18-20 New American Bible (Revised Edition) (NABRE)
18 Do not be reluctant when you let them go free, since the service they have given you for six years was worth twice a hired laborer’s salary; and the Lord, your God, will bless you in everything you do.
Firstlings. 19 You shall consecrate to the Lord, your God, every male firstling born in your herd and in your flock. You shall not work the firstlings of your cattle, nor shear the firstlings of your flock. 20 In the presence of the Lord, your God, you shall eat them year after year, you and your household, in the place that the Lord will choose.