"Do not hold back offerings from your granaries or your vats. "You must give me the firstborn of your sons.
You shall not delay to bring to Me from the fullness [of your harvested grain] and the outflow [of your grape juice and olive oil]; give Me the firstborn of your sons [or redeem them]. [Exod. 34:19, 20.]AMP
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.