Verse 17

But you must not redeem the firstborn of a cow or a sheep or a goat; they are holy. You must splash their blood on the altar and burn their fat for an offering made by fire for a pleasing aroma to the LORD.

Referenced Verses

• Exod 29:16 : 16 and you are to kill the ram and take its blood and splash it all around on the altar.
• Lev 3:2-5 : 2 He must lay his hand on the head of his offering and slaughter it at the entrance of the Meeting Tent, and the sons of Aaron, the priests, must splash the blood against the altar’s sides. 3 Then the one presenting the offering must present a gift to the LORD from the peace offering sacrifice: He must remove the fat that covers the entrails and all the fat that surrounds the entrails, 4 the two kidneys with the fat on their sinews, and the protruding lobe on the liver(which he is to remove along with the kidneys). 5 Then the sons of Aaron must offer it up in smoke on the altar atop the burnt offering that is on the wood in the fire as a gift of a soothing aroma to the LORD.
• Deut 15:19-22 : 19 Giving God the Best You must set apart for the LORD your God every firstborn male born to your herds and flocks. You must not work the firstborn of your bulls or shear the firstborn of your flocks. 20 You and your household must eat them annually before the LORD your God in the place he chooses. 21 If they have any kind of blemish– lameness, blindness, or anything else– you may not offer them as a sacrifice to the LORD your God. 22 You may eat it in your villages, whether you are ritually impure or clean, just as you would eat a gazelle or an ibex.