What does 1 Samuel 26:7 mean?

So David and Abishai snuck into Saul's camp at night. Saul was asleep in the middle of the camp, his spear stuck in the ground by his head. Abner and the rest of the soldiers were sleeping all around him. 1 Samuel 26:7 - Modern Text Bible

(David and his friend Abishai risk everything to get close to Saul, who’s surrounded by his best men. Saul’s spear is right by his head, showing how vulnerable he is.)