2 Samuel 12:9

Despised the commandment. Upon David as the divinely appointed ruler of Israel rested the responsibility to uphold God’s law and to teach the nation to obey its precepts. By his example David had shown contempt for God’s law and had encouraged his people to disregard its precepts. The king who should have been a terror to the doers of iniquity had encouraged them in their course of evil. He had proved himself unfaithful to the solemn responsibilities that God had placed upon him.

Thou hast killed Uriah. By ordering the death of Uriah by the hand of the Ammonites, David was as guilty of the blood of his trusted officer as if he had performed the slaying with his own sword. God Himself placed upon David the accusation of murder, and from this charge there was no escape.

Taken his wife. David had no right to Bath-sheba. She was the lawful wife of Uriah. In slaying Uriah and then taking his wife, David committed an offense that throughout the ages has given enemies of the Lord the opportunity to blaspheme and reproach God’s holy name.