2 Samuel 12:13-16

Then David said to Nathan, “I have sinned against the LORD.” Nathan replied, “The LORD has taken away your sin. You are not going to die. But because by doing this you have shown utter contempt for the LORD, the son born to you will die.” After Nathan had gone home, the LORD struck the child that Uriah’s wife had borne to David, and he became ill. David pleaded with God for the child. He fasted and spent the nights lying in sackcloth on the ground.