And this sign shall come to you concerning your two sons Hophni and Phinehas: They will both die on the same day.
Eli reproved his sons too gently, and did not threaten them as he should, and therefore God sent a prophet to him to reprove him sharply, and to threaten him, because, by his indulgence of them, he had strengthened their hands in their wickedness.
Commenting on 1 Samuel 2:27-36
And I will raise up a faithful priest,.... Not Samuel, as some, for he was not of the seed of Aaron, and of the priestly race; nor had he a sure house, for his sons declined from the ways of truth and justice; but Zadok, as it is commonly interpreted, who was put into the office of the high priest by Solomon when he came...
They shall die both of them - Hophni and Phinehas were both killed very shortly after in the great battle with the Philistines in which the Israelites were completely routed, and the ark taken. See Sa1 4:1-11.