2 Samuel 12:9 - Matthew Poole's English Annotations on the Holy Bible

The commandment of the Lord, i. e. those laws of God which forbade thee to do this thing, by not giving them that respect and observance which they deserved. Uriah the Hittite; that valiant, and generous, and noble person. Hast taken his wife to be thy wife: this he mentions amongst his other sins; partly because he had rewarded her, who by God's law should have been severely punished; partly because he compassed this marriage by wicked practices, even by Uriah's murder, and for sinful ends, even for the gratification of his inordinate and sensual lusts, and for the concealment of that sin which he was obliged to confess and lament. Hast slain him with the sword of the children of Ammon; those cursed enemies of God, and of his people, whom thou hast encouraged and hardened in their idolatry, by giving up him and others of God's people into their hands. And note here, that although David did not kill Uriah himself, nor command any to do it; but only that he should be put upon dangerous service (which a general of an army oft doth to soldiers under him, on justifiable accounts, without being therefore legally chargeable with murder, though the person so employed die in the service); yet in God's account, who judged of David's design therein, it is justly so reputed. And therefore, though the Ammonites slew Uriah, yet David is said to have killed him with their sword.