1 Samuel 26:7-14, 21-25

So David and Abishai went to the army during the night, and there was Saul lying asleep inside the circle of the camp with his spear stuck in the ground by his head; and Abner and the people were lying around him. Then Abishai said to David, “God has given your enemy into your hand this day; now then, please let me strike him with the spear driving it to the ground with one stroke, and I will not strike him the second time.” But David said to Abishai, “Do not kill him, for who can put out his hand against the LORD’S anointed [king] and be guiltless (innocent)?” David also said, “As the LORD lives, most certainly the LORD will strike him [in His own time and way], or his day will come and he will die, or he will go down into battle and be carried off [dead]. The LORD forbid that I would put out my hand against the LORD’S anointed; but now take the spear that is by his head and the jug of water, and let us go.” So David took the spear and the jug of water from beside Saul’s head, and they left, and no one saw or knew nor did anyone awaken, because they were all sound asleep, for a deep sleep from the LORD had fallen on them. Then David crossed over to the other side and stood on the top of the mountain at a distance, with a large area between them. David called to the army and to Abner the son of Ner, “Will you not answer, Abner?” Abner replied, “Who are you who calls [and disturbs] the king?”

Then Saul said, “I have sinned. Return, my son David, for I will not harm you again because my life was precious in your sight this day. Hear me, I have played the fool and have done a very great wrong [to you].” David answered, “Look, here is the king’s spear! Now let one of the young men come over and get it. The LORD will repay each man for his righteousness and his faithfulness; for the LORD handed you over to me today, but I refused to put out my hand against the LORD’S anointed. Now behold, just as your life was precious in my sight this day, so let my life be precious in the sight of the LORD, and may He rescue me from all distress.” Then Saul said to David, “May you be blessed, my son David; you will both accomplish much and certainly prevail.” So David went on his way, and Saul returned to his place.