2 Samuel 21:15-17

And the Philistines had war again with Israel; and David went down, and his servants with him, and fought against the Philistines. And David waxed faint; and Ishbi-benob, who was of the sons of the giant, the weight of whose spear was three hundred shekels of brass in weight, he being girded with a new sword, thought to have slain David. But Abishai the son of Zeruiah succored 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 lamp of Israel.