In Gath, i. e. in the territory of the city of Gath; which circumstance intimates that this, and consequently the other battles here described, were fought before David had taken Gath out of the hands of the Philistines, which he did 2 Samuel 8:1, compared with 1 Chronicles 18:1, and therefore not in the last days of David, as some conceive from their mention in this place. A man of great stature, or, a man of Middin or Madon, as the LXX. render it; so called from the place of his birth, as Goliath is said to be of Gath for the same reason.
Related Commentaries of 2 Samuel 21:20
2 Samuel 21:20
20 And there was yet a battle in Gath, where was a man of great stature, that had on every hand six fingers, and on every foot six toes, four and twenty in number; and he also was born to the giant.h