Leviticus 1:12-16

Then you are to cut it into pieces, and the priest shall carefully place the pieces, including the head and the fat, on the wood burning on the altar.

You shall wash the insides and legs with water, and the priest shall burn all of it on the altar as a burnt offering, a food offering, to be accepted by the Lord.

If your offering to the Lord is a burnt offering of birds, you are to offer a turtledove or a young pigeon.

The priest shall take it to the altar, twist off its head, and burn it on the altar. Its blood shall be drained out on the side of the altar.

He must remove the crop and the feathers, and throw them to the east side of the altar into the ash pile.