Abishai said to David, “God has put your enemy in your power tonight. Now let me plunge his own spear through him and pin him to the ground with just one blow—I won't have to strike twice!”
Then Johanan said privately to him, “Let me go and kill Ishmael, and no one will know who did it. Why should he be allowed to murder you? That would cause all the Jews who have gathered around you to be scattered, and it would bring disaster on all the people who are left in Judah.”
The Lord gave them peace throughout the land, just as he had promised their ancestors. Not one of all their enemies had been able to stand against them, because the Lord gave the Israelites the victory over all their enemies.
They said to him, “This is your chance! The Lord has told you that he would put your enemy in your power and you could do to him whatever you wanted to.” David crept over and cut off a piece of Saul's robe without Saul's knowing it.
So that night David and Abishai entered Saul's camp and found Saul sleeping in the center of the camp with his spear stuck in the ground near his head. Abner and the troops were sleeping around him.