1 Samuel 2:21

Context
2:21 So the Lord graciously attended to Hannah, and she was able to conceive and gave birth to three sons and two daughters. The boy Samuel grew up at the Lord’s sanctuary. ¹ 

1 Samuel 13:17

Context
13:17 Raiding bands went out from the camp of the Philistines in three groups. One band turned toward the road leading to Ophrah by the land of Shual;

1 Samuel 31:6

Context
31:6 So Saul, his three sons, his armor bearer, and all his men died together that day.

1 Samuel 31:8

Context

31:8 The next day, when the Philistines came to strip loot from the corpses, they discovered Saul and his three sons lying dead ²  on Mount Gilboa.