The Burnt offering: The Fat of all Peace offerings Laid On, and Consumed With
Source: TTT
Leviticus 3:5
Then Aaron’s sons are to burn it on the altar atop the burnt offering that is on the burning wood, as an offering made by fire, a pleasing aroma to the LORD.
Leviticus 6:12
The fire on the altar shall be kept burning; it must not be extinguished. Every morning the priest is to add wood to the fire, arrange the burnt offering on it, and burn the fat portions of the peace offerings on it.