1 Samuel 20:31-33

For as long as the son of Jesse liveth upon the ground, thou shalt not be established, nor thy kingdom. Wherefore now send and fetch him unto me, for he shall surely die. And Jonathan answered Saul his father, and said unto him, Wherefore should he be put to death? what hath he done? And Saul cast his spear at him to smite him; whereby Jonathan knew that it was determined of his father to put David to death.