Bible Verses About Sheep: Firstlings of, not to be redeemed

But the first borne of a kow, or the first borne of a sheepe, or the first borne of a goate shalt thou not redeeme: for they are holy: thou shalt sprinkle their blood at the altar, and thou shalt burne their fat: it is a sacrifice made by fire for a sweete sauour vnto the Lord.