the first-born.

Exodus 13:2, 12-15
"Consecrate to Me every firstborn male. The firstborn from every womb among the Israelites belongs to Me, both of man and beast." . . .

Exodus 34:19
The first offspring of every womb belongs to Me, including all the firstborn males among your livestock, whether cattle or sheep.

Leviticus 27:26, 27
But no one may consecrate a firstborn of the livestock, because a firstborn belongs to the LORD. Whether an animal from the herd or flock, it is the LORD's. . . .

Numbers 18:15, 16
The firstborn of every womb, whether man or beast, that is offered to the LORD belongs to you. But you must surely redeem every firstborn son and every firstborn male of unclean animals. . . .

Deuteronomy 12:6
To that place you are to bring your burnt offerings and sacrifices, your tithes and heave offerings, your vow offerings and freewill offerings, as well as the firstborn of your herds and flocks.

unto.

Numbers 18:9-19
A portion of the most holy offerings reserved from the fire will be yours. From all the offerings that they give Me, whether grain offerings, sin offerings, or guilt offerings, it shall be most holy to you and your sons. . . .

1 Corinthians 9:6-14
Or are Barnabas and I the only apostles who must work for a living? . . .

Galatians 6:6
However, the one who receives instruction in the word must share in all good things with his instructor.