Exodus 13:12
12 dyou shall set apart to the Lord all that first opens the womb. All the firstborn of your animals that are males shall be the Lord’s.
Numbers 18:17
17 uBut the firstborn of a cow, or the firstborn of a sheep, or the firstborn of a goat, you shall not redeem; they are holy. You shall sprinkle their blood on the altar and shall burn their fat as a food offering, with a pleasing aroma to the Lord.
Proverbs 3:9
9 Honor the Lord with your wealth
and with qthe firstfruits of all your produce;
