1 Samuel 2:11-15

Then Elkanah went to his home at Ramah. But the boy continued to attend to the service of the Lord before Eli the priest. The Sin of Eli’s Sons

Now the sons of Eli were useless men; they did not know the Lord.

And this was the custom of the priests with the people: when anyone was offering a sacrifice, the priest’s servant would come while the meat was cooking, with a three-pronged fork in his hand.

And he would thrust it into the pan, or kettle, or caldron, or pot; everything that the fork brought up, the priest would take for himself. They did so in Shiloh to all the Israelites who came there.

Also, before they burned the fat, the priest’s servant would come and say to the man who was sacrificing, “Give the priest meat for roasting, as he will not take cooked meat from you, only raw.”