1. Now the Philistines gathered together all their armies to Aphek: and the Israelites pitched by a fountain which is in Jezreel.
2. And the lords of the Philistines passed on by hundreds, and by thousands: but David and his men passed on in the rereward with Achish.
3. Then said the princes of the Philistines, What do these Hebrews here? And Achish said unto the princes of the Philistines, Is not this David, the servant of Saul the king of Israel, which hath been with me these days, or these years, and I have found no f
4. And the princes of the Philistines were wroth with him; and the princes of the Philistines said unto him, Make this fellow return, that he may go again to his place which thou hast appointed him, and let him not go down with us to battle, lest in the batt
5. Is not this David, of whom they sang one to another in dances, saying, Saul slew his thousands, and David his ten thousands?
6. Then Achish called David, and said unto him, Surely, as the LORD liveth, thou hast been upright, and thy going out and thy coming in with me in the host is good in my sight: for I have not found evil in thee since the day of thy coming unto me unto this d
7. Wherefore now return, and go in peace, that thou displease not the lords of the Philistines.
8. And David said unto Achish, But what have I done? and what hast thou found in thy servant so long as I have been with thee unto this day, that I may not go fight against the enemies of my lord the king?
9. And Achish answered and said to David, I know that thou art good in my sight, as an angel of God: notwithstanding the princes of the Philistines have said, He shall not go up with us to the battle.
10. Wherefore now rise up early in the morning with thy master's servants that are come with thee: and as soon as ye be up early in the morning, and have light, depart.
11. So David and his men rose up early to depart in the morning, to return into the land of the Philistines. And the Philistines went up to Jezreel.

Deuteronomy 10:20 Thou shalt fear the LORD thy God; him shalt thou serve, and to him shalt thou cleave, and swear by his name.

1 Samuel 20:3 And David sware moreover, and said, Thy father certainly knoweth that I have found grace in thine eyes; and he saith, Let not Jonathan know this, lest he be grieved: but truly as the LORD liveth, and as thy soul liveth, there is but a step between me and

1 Samuel 28:10 And Saul sware to her by the LORD, saying, As the LORD liveth, there shall no punishment happen to thee for this thing.

Isaiah 65:16 That he who blesseth himself in the earth shall bless himself in the God of truth; and he that sweareth in the earth shall swear by the God of truth; because the former troubles are forgotten, and because they are hid from mine eyes.

Jeremiah 12:16 And it shall come to pass, if they will diligently learn the ways of my people, to swear by my name, The LORD liveth; as they taught my people to swear by Baal; then shall they be built in the midst of my people.