2 Samuel 4:9-11

David answered Rechab and Baanah his brother, sons of Rimmon the Beerothite, and said to them, “As the LORD lives, who has redeemed my life from all distress, when one told me, saying, ‘Behold, Saul is dead,’ and thought he was bringing good news, I seized him and killed him in Ziklag, which was the reward I gave him for his news. How much more, when wicked men have killed a righteous man in his own house on his bed, shall I not now require his blood from your hand and destroy you from the earth?”