Judges 8:20

And he said unto Jether his firstborn, Up, and slay them. But the youth drew not his sword: for he feared, because he was yet a youth.

And he said unto Jether, his firstborn, up, and slay them,.... Being the near kinsman of his father's brethren, whom these kings had slain, was a proper person to avenge their blood on them; and the rather Gideon might order him to do it, for the greater mortification of the kings, to die by the hand of a youth; and for the honour of his son, to be the slayer of two kings, and to inure him to draw his sword against the enemies of Israel, and embolden him to do such exploits:

But the youth drew not his sword, for he feared, because he was yet a youth; his not drawing is sword was not out of disobedience to his father, but through fear of the kings; not of their doing him any harm, being bound; but there was perhaps a ferocity, as well as majesty in their countenances, which made the young man timorous and fearful.