Deuteronomy 15:18-20 World English Bible (WEB)
18 It shall not seem hard to you, when you let him go free from you; for he has been double value of a hired hand as he served you six years. Yahweh your God will bless you in all that you do. 19 You shall dedicate all the firstborn males that are born of your herd and of your flock to Yahweh your God. You shall do no work with the firstborn of your herd, nor shear the firstborn of your flock. 20 You shall eat it before Yahweh your God year by year in the place which Yahweh shall choose, you and your household.