18 Later there was another skirmish with the Philistines at Gob. That time Sibbecai the Hushathite killed Saph, another of the warriors descended from Rapha. 19 At yet another battle with the Philistines at Gob, Elhanan son of Jaar, the weaver of Bethlehem, killed Goliath the Gittite whose spear was as big as a flagpole. 20 Still another fight broke out in Gath. There was a giant there with six fingers on his hands and six toes on his feet - twenty-four fingers and toes! He was another of those descended from Rapha. 21 He insulted Israel, and Jonathan son of Shimeah, David's brother, killed him. 22 These four were descended from Rapha in Gath. And they all were killed by David and his soldiers.
Matthew Henry's Commentary on 2 Samuel 21:18-22
Commentary on 2 Samuel 21:15-22
(Read 2 Samuel 21:15-22)
These events seem to have taken place towards the end of David's reign. David fainted, but he did not flee, and God sent help in the time of need. In spiritual conflicts, even strong saints sometimes wax faint; then Satan attacks them furiously; but those who stand their ground and resist him, shall be relieved and made more than conquerors. Death is a Christian's last enemy, and a son of Anak; but through Him that triumphed for us, believers shall be more than conquerors at last, even over that enemy.