Exodus 22:29

29 “Do not hold back offerings from your granaries or your vats.a“You must give me the firstborn of your sons.

Read Exodus 22:29 Using Other Translations

Thou shalt not delay to offer the first of thy ripe fruits, and of thy liquors: the firstborn of thy sons shalt thou give unto me.
"You shall not delay to offer from the fullness of your harvest and from the outflow of your presses. The firstborn of your sons you shall give to me.
“You must not hold anything back when you give me offerings from your crops and your wine. “You must give me your firstborn sons.