John Gill's Bible Commentary Ver. 8. He smote the Philistines even unto Gaza, and the borders thereof , etc.] Who in his father’s time had invaded Judah, and taken many cities and towns in it, which Hezekiah now recovered, and drove them to their own territories, of which Gaza was one; (see 2 Chronicles 28:18) from the tower of the watchmen to the fenced city ; that is, places both great and small, cities, towns, and villages; of this phrase, (see 2 Kings 17:9).
Matthew Henry Commentary
Verses 1-8 - Hezekiah was a true son of David. Some others did that which was right but not like David. Let us not suppose that when times and men are bad they must needs grow worse and worse; that does not follow: after man bad kings, God raised one up like David himself. The brazen serpent ha been carefully preserved, as a memorial of God's goodness to their fathers in the wilderness; but it was idle and wicked to burn incens to it. All helps to devotion, not warranted by the word of God interrupt the exercise of faith; they always lead to superstition an other dangerous evils. Human nature perverts every thing of this kind True faith needs not such aids; the word of God, daily thought upon an prayed over, is all the outward help we need.
Original Hebrew הוא1931 הכה5221 את853 פלשׁתים6430 עד5704 עזה5804 ואת853 גבוליה1366 ממגדל4026 נוצרים5341 עד5704 עיר5892 מבצר׃4013