Leviticus 1:13

but the entrails and the legs he shall wash with water . And the priest shall offer all of it and burn it on the altar ; it is 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 bring all of them and burn them on the altar. It is a burnt offering, a food offering, an aroma pleasing to the Lord.

But he shall wash the inwards and the legs with water : and the priest shall bring it all, and burn it upon the altar : it is a burnt sacrifice, an offering made by fire, of a sweet savour unto the Lord.