1 Samuel 2:15-16

15Also, before they burned (offered) the fat, the priest’s servant would come and say to the man who was sacrificing, “Give the priest meat to roast, since he will not accept boiled meat from you, only raw.”

16If the man said to him, “Certainly they are to burn (offer) the fat first, and then you may take as much as you want,” then the priest’s servant would say, “No! You shall give it to me now or I will take it by force.”