But Abishai the son of Zeruiah came to his aid and attacked the Philistine and killed him. Then David’s men swore to him, “You shall no longer go out with us to battle, lest you quench the lamp of Israel.”
We have here the story of some conflicts with the Philistines, which happened, as it should seem, in the latter end of David's reign. Though he had so subdued them that they could not bring any great numbers into the field, yet as long as they had any giants among them to be their champions, they would never be quiet, but took all occasions to...
Commenting on 2 Samuel 21:15-22
And it came to pass after this,.... After the former battle: that there was again a battle with the Philistines at Gob; in Ch1 20:4 it is called Gezer; either the place had two names, or these two places were near each other; so that the battle may be said to be fought both at the one and at the other, being fought equally near...
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. (n) For the glory and wealth of the country stands in the preservation of the godly magistrate.