John 1:8-9
He was not the light, but came to bear witness of the light.
John 5:35
He was a burning and shining lamp, and you were willing to rejoice for a time in 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.