SEV Biblia, Chapter 8:20 Y dijo a Jeter su primogénito: Levántate, y mátalos. Mas el joven no desenvainó su espada, porque tenía temor; que aun era muchacho.
Clarke's Bible Commentary - Judges 8:20 Verse 20. He said unto Jether his first-born] By the ancient laws of war, prisoners taken in war might be either slain, sold, or kept for slaves. To put a captive enemy to death no executioner was required. Gideon slays Zebah and Zalmunna with his own hand. So Sam. is said to have hewn Agag in pieces, 1 Sam. xv. 33. Benaiah slew Joab, 1 Kings ii. 25. Saul orders his guards to slay the priests who had contributed to the escape of David, 1 Samuel xxii. 17; and David caused one of his attendants to slay the Amalekite who pretended to have slain Saul, 2 Sam. i. 15.
John Gill's Bible Commentary Ver. 20. And he said unto Jether, his firstborn, up, and slay them , etc.] 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.
Matthew Henry Commentary Verses 18-21 - The kings of Midian must be reckoned with. As they confessed themselve guilty of murder, Gideon acted as the avenger of blood, being the nex of kin to the persons slain. Little did they think to have heard of this so long after; but murder seldom goes unpunished in this life Sins long forgotten by man, must be accounted for to God. What poor consolation in death from the hope of suffering less pain, and of dyin with less disgrace than some others! yet many are more anxious on thes accounts, than concerning the future judgment, and what will follow.
Original Hebrew ויאמר 559 ליתר 3500 בכורו 1060 קום 6965 הרג 2026 אותם 853 ולא 3808 שׁלף 8025 הנער 5288 חרבו 2719 כי 3588 ירא 3372 כי 3588 עודנו 5750 נער׃ 5288