Some time later at Gob, there was another battle with the Philistines. At that time Sibbecai the Hushathite killed Saph, a descendant of Rapha.
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 there was again a battle in Gob with the Philistines,.... Another battle with them in the same place: where Elhanan the son of Jaareoregim, a Bethlehemite, slew the brother of Goliath the Gittite; the word "brother" is rightly supplied from Ch1 20:5; where his name is said to be Lahmi, for not Goliath himself was slain, though some so interpret it, and take Elhanan...
And it came to pass after this, that there was again a battle with the Philistines at Gob: then Sibbechai the Hushathite slew Saph, which [was] of the sons of the giant. (o) Called Gezer, and Saph is called Sippai, .