John 1:8-9
He was not the Light, but he existed that he might give testimony concerning the Light.
John 5:35
He was the lamp that burned and shone, and for a time you were willing to be gladdened by his light.
Treasury of Scripture Knowledge
Summary
But Abishai the son of Zeruiah succoured him, and smote the Philistine, and killed him. Then the men of David sware unto him, saying, Thou shalt go no more out with us to battle, that thou quench not the light of Israel.