Exodus 22:29

29“You shall not delay to offer from the fullness of your harvest and from the outflow of your presses. aThe firstborn of your sons you shall give to me.

Exodus 23:10

Laws About the Sabbath and Festivals

10 b“For six years you shall sow your land and gather in its yield,

Leviticus 2:12

12 cAs an offering of firstfruits you may bring them to the Lord, but they shall not be offered on the altar for a pleasing aroma.

Deuteronomy 18:4

4 dThe firstfruits of your grain, of your wine and of your oil, and the first fleece of your sheep, you shall give him.
Copyright information for ESV