'Lamp' in the Bible

and Abishai son of Zeruiah giveth help to him, and smiteth the Philistine, and putteth him to death; then swear the men of David to him, saying, 'Thou dost not go out again with us to battle, nor quench the lamp of Israel.'

For Thou art my lamp, O Jehovah, And Jehovah doth lighten my darkness.