David went there to Mizpeh of Moab: and he said to the king of Moab, Please let my father and my mother come forth, [and be] with you, until I know what God will do for me.
So the one escaped to David from the house of Ahimelech, and David felt really responsible for the death of all of those families. He knew that he made a mistake in letting this Doeg go. He should've killed him. "