The Lord hath avenged. — It is not to be supposed that the murderers pretended a Divine commission for their wicked deed; they only meant to say that, in the providence of God, David was thus avenged on the seed of his cruel persecutor. Yet they state the fact in the way they thought best calculated to awaken the gratitude of David towards themselves.
Related Commentaries of 2 Samuel 4:8
2 Samuel 4:8
8 And they brought the head of Ishbosheth unto David to Hebron, and said to the king, Behold the head of Ishbosheth the son of Saul thine enemy, which sought thy life; and the LORD hath avenged my lord the king this day of Saul, and of his seed.