Charles Ellicott Commentary 2 Samuel 21:18

"And it came to pass after this, that there was again war with the Philistines at Gob: then Sibbecai the Hushathite slew Saph, who was of the sons of the giant." — 2 Samuel 21:18 (ASV)

At Gob. — Compare to 2 Samuel 21:19. The place is otherwise unknown. 1 Chronicles 20:4 reads “Gezer,” and the Septuagint substitutes “Gath.” (Compare to 2 Samuel 21:20.) It is not at all remarkable that the names of many small places should be lost after the lapse of three thousand years, nor that the locality of the hamlet should be marked in the later chronicles by the better known neighbouring town of Gezer.

Sibbechai the Hushathite. — Compare to 1 Chronicles 20:4. He is also mentioned in the list of heroes (1 Chronicles 11:29); but in 2 Samuel 23:27 the name is changed into “Mebunnai the Hushathite” by a slight alteration in the letters of the original. He was captain of the eighth division of the army (1 Chronicles 26:11). The giant whom he slew is called “Sippai” in the parallel place in Chronicles, and it is there said that the Philistines were subdued.