2 Samuel 21:16 in the King James Version
And Ishbi-benob, which was of the sons of the giant, the weight of whose spear weighed three hundred shekels of brass in weight, he being girded with a new sword, thought to have slain David.
Context
15 The Philistines had war again with Israel; and David went down, and his servants with him, and fought against the Philistines. David grew faint;
16 and Ishbibenob, who was of the sons of the giant, the weight of whose spear was three hundred shekels of bronze in weight, he being armed with a new sword, thought he would kill David.
17 But Abishai the son of Zeruiah helped him, and struck the Philistine and killed him. Then the men of David swore to him, saying, “Don’t go out with us to battle any more, so that you don’t quench the lamp of Israel.”