1 Samuel 20:33

And Saul lifted up his spear against Jonathan to kill him: so Jonathan knew that this evil was determined on by his father to kill David.

And Saul cast a javelin at him to smite him: whereby Jonathan knew that it was determined of his father to slay David.

Saul cast his spear at him to strike him. By this Jonathan knew that his father was determined to put David to death.