1 Samuel 20:33 in the World English Bible
Saul cast his spear at him to strike him. By this Jonathan knew that his father was determined to put David to death.
Context
32 And Jonathan answered Saul his father, and said unto him, Wherefore shall he be slain? what hath he done?
33 And Saul cast a javelin at him to smite him: whereby Jonathan knew that it was determined of his father to slay David.
34 So Jonathan arose from the table in fierce anger, and did eat no meat the second day of the month: for he was grieved for David, because his father had done him shame.