Leviticus 1:13, 17

But the internal organs and the legs must first be washed with water. Then the priest will burn the entire sacrifice on the altar as a burnt offering. It is a special gift, a pleasing aroma to the LORD.

Then, grasping the bird by its wings, the priest will tear the bird open, but without tearing it apart. Then he will burn it as a burnt offering on the wood burning on the altar. It is a special gift, a pleasing aroma to the LORD.