1 Samuel 20:30-34

30Then Saul became angry with Jonathan and shouted, “You son of a perverse and rebellious woman! Don’t I know that you are siding with Jesse’s son to your own shame and to the disgrace of your mother?

31Every day Jesse’s son lives on earth you and your kingship are not secure. Now send for him and bring him to me — he must die!”

32Jonathan answered his father back, “Why is he to be killed? What has he done?”

33Then Saul threw his spear at Jonathan to kill him, so he knew that his father was determined to kill David.

34He got up from the table fiercely angry and did not eat any food that second day of the New Moon, for he was grieved because of his father’s shameful behavior toward David.