1 Samuel 2:15

15 But even before the fat was burned, the priest’s servant would come and say to the person who was sacrificing, “Give the priest some meat to roast; he won’t accept boiled meat from you, but only raw.”

Read 1 Samuel 2:15 Using Other Translations

Also before they burnt the fat, the priest's servant came, and said to the man that sacrificed, Give flesh to roast for the priest; for he will not have sodden flesh of thee, but raw.
Moreover, before the fat was burned, the priest's servant would come and say to the man who was sacrificing, "Give meat for the priest to roast, for he will not accept boiled meat from you but only raw."
Sometimes the servant would come even before the animal’s fat had been burned on the altar. He would demand raw meat before it had been boiled so that it could be used for roasting.