Sins of the Sons of a Priest

I Samuel 2:12-17

12  Now the sons of Eli were sons of Belial; they knew not the LORD. 
13  And the priests' custom with the people was, that, when any man offered sacrifice, the priest's servant came, while the flesh was in seething, with a fleshhook of three teeth in his hand; 
14  And he struck it into the pan, or kettle, or caldron, or pot; all that the fleshhook brought up the priest took for himself. So they did in Shiloh unto all the Israelites that came thither. 
15  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. 
16  And if any man said unto him, Let them not fail to burn the fat presently, and then take as much as thy soul desires; then he would answer him, Nay; but thou shalt give it me now: and if not, I will take it by force. 
17  Wherefore the sin of the young men was very great before the LORD: for men abhorred the offering of the LORD.