Leviticus 1:9

but its entrails and its legs he shall wash with water . And the priest shall burn all of it on the altar , as a burnt offering , a food offering with a pleasing aroma to the Lord .

You are to wash the internal organs and the legs with water, and the priest is to burn all of it on the altar. It is a burnt offering, a food offering, an aroma pleasing to the Lord.

But his inwards and his legs shall he wash in water : and the priest shall burn all on the altar, to be a burnt sacrifice, an offering made by fire, of a sweet savour unto the Lord.