Numbers 18:17
But you are not to redeem the firstborn of a cow, sheep, or a female goat. They are holy. You are to sprinkle their blood on the altar and burn their fat for an offering made by fire, a pleasing aroma to the LORD.
Exodus 29:16
Then you are to slaughter the ram, take its blood, and scatter it around the altar.
Leviticus 3:2-5
Then the presenter is to lay his hand on the head of the offering and slaughter it at the entrance to the Tent of Meeting. After this, Aaron's sons, the priests, are to sprinkle the blood on and around the altar.
Deuteronomy 15:19-22
"Set apart for the LORD your God every firstborn male among your herd and flock. You must not put the firstborn of your ox to work or shear the firstborn of your flock.