Judges 8:18-21

18Then Gideon said to Zebah and Zalmunna, “What kind of men were they whom you killed at Tabor?” And they replied, “They were like you, each one of them resembled the son of a king.”

19He said, “They were my brothers, the sons of my mother. As the Lord lives, if only you had let them live, I would not kill you.”

20So [to humiliate them] Gideon said to Jether his firstborn, “Stand up, and kill them!” But the youth did not draw his sword, because he was afraid, for he was still [just] a boy.

21Then Zebah and Zalmunna said, “Rise up yourself and strike us; for as the man is, so is his strength.” So Gideon arose and killed Zebah and Zalmunna, and took the crescent amulets that were on their camels’ necks.