1 Samuel 20:30, 33

Then Saul’s anger was kindled against Jonathan, and he said to him, “You son of a perverse, rebellious woman, do I not know that you have chosen the son of Jesse to your own shame, and to the shame of your mother’s nakedness?

But Saul hurled his spear at him to strike him. So Jonathan knew that his father was determined to put David to death.