2 Samuel 22:29 in the King James Version
For thou art my lamp, O LORD: and the LORD will lighten my darkness.
Context
28 You will save the afflicted people, but your eyes are on the arrogant, that you may bring them down.
29 For you are my lamp, LORD. The LORD will light up my darkness.
30 For by you, I run against a troop. By my God, I leap over a wall.