Leviticus 1:13, 17

The person must wash the animal’s inner organs and legs with water, and then the priest must burn all its parts on the altar. It is a whole burnt offering, an offering made by fire, and its smell is pleasing to the LORD.

Then he must tear the bird open by its wings without dividing it into two parts. He must burn the bird on the altar, on the wood which is on the fire. It is a whole burnt offering, an offering made by fire, and its smell is pleasing to the LORD.