1 Samuel 2:22-25

22 Eli was very old now. He heard about everything that his sons were doing to all the Israelites. He knew that his sons had sex with some of the women helpers. Those women worked at the door of the Tent of Meeting. 23 Eli said to his sons, ‘People have told me about all the evil things that you do. 24 No, my sons, you should not do these terrible things. The Lord's people all complain about you. 25 If you do something bad to another person, God can speak on your behalf. But if you do something bad against the Lord, nobody can speak on your behalf.’

Eli's sons did not listen to their father. The Lord had already decided to kill them.