John Gills Exposition of the Bible Commentary - 2 Samuel 4:10
When one told me, saying, behold, Saul is dead ,.... No more is related, not that he killed him, or assisted in killing him, only that he was dead; by which it appears, as Abarbinel thinks, that the Amalekite did not slay Saul, and that David did not put him to death on that account, but for what follows: thinking to have brought good tidings ; which would have been very acceptable to David, that he would have rejoiced and exulted at it as he did; but he was mistaken; instead of that, ... read more
Matthew Henry's Complete Commentary - 2 Samuel 4:9-12
We have here justice done upon the murderers of Ish-bosheth. I. Sentence passed upon them. There needed no evidence, their own tongues witnessed against them; they were so far from denying the fact that they gloried in it. David therefore shows them the heinousness of the crime, and that blood called for blood from his hand, who was now the chief magistrate, and was by office the avenger of blood. And, perhaps, he was the more vigorous in the prosecution because for reasons of state he had... read more