4 He removed the high places, and brake the images,  and cut down the groves, and brake in pieces the brasen serpent that Moses had made: for unto those days the children of Israel did burn incense to it: and he called it Nehushtan.
4 He removed the high places, smashed the sacred stones and cut down the Asherah poles. He broke into pieces the bronze snake Moses had made, for up to that time the Israelites had been burning incense to it. (It was called Nehushtan."Nehushtan" sounds like the Hebrew for both "bronze" and "snake" . )
English Standard Version
4 He removed the high places and broke the pillars and cut down the Asherah. And he broke in pieces the bronze serpent that Moses had made, for until those days the people of Israel had made offerings to it (it was called Nehushtan).Nehushtan sounds like the Hebrew for both bronze and serpent
4 He got rid of the local fertility shrines, smashed the phallic stone monuments, and cut down the sex-and-religion Asherah groves. As a final stroke he pulverized the ancient bronze serpent that Moses had made; at that time the Israelites had taken up the practice of sacrificing to it - they had even dignified it with a name, Nehushtan (The Old Serpent).
New King James Version
4 He removed the high places and broke the sacred pillars, cut down the wooden image and broke in pieces the bronze serpent that Moses had made; for until those days the children of Israel burned incense to it, and called it Nehushtan.
New Living Translation
4 He removed the pagan shrines, smashed the sacred pillars, and cut down the Asherah poles. He broke up the bronze serpent that Moses had made, because the people of Israel had been offering sacrifices to it. The bronze serpent was called Nehushtan.
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 many bad kings, God raised one up like David himself. The brazen serpent had been carefully preserved, as a memorial of God's goodness to their fathers in the wilderness; but it was idle and wicked to burn incense to it. All helps to devotion, not warranted by the word of God, interrupt the exercise of faith; they always lead to superstition and other dangerous evils. Human nature perverts every thing of this kind. True faith needs not such aids; the word of God, daily thought upon and prayed over, is all the outward help we need.