1 Samuel 22:6

When Saul heard that David was discovered, and the men that were with him, (now Saul abode in Gibeah under a tree in Ramah, having his spear in his hand, and all his servants were standing about him;)

Cross-reference

1 Samuel 19:9 again shows Saul with his spear while David plays—a recurring motif of Saul's murderous intent.

In 1 Samuel 20:33, Saul actually hurls his spear at Jonathan—the spear is a consistent symbol of his violence.