He removed from the entrance to the temple of the LORD the horses that the kings of Judah1 had dedicated to the sun. They were in the court near the room of an official named Nathan-Melech. Josiah then burned the chariots dedicated to the sun.2
References for 2 Kings 23:11
He pulled down3 the altars the kings of Judah had erected on the roof4 near the upper room of Ahaz, and the altars Manasseh had built in the two courts5 of the temple of the LORD. He removed them from there, smashed them to pieces and threw the rubble into the Kidron Valley.6
References for 2 Kings 23:12
The king also desecrated the high places that were east of Jerusalem on the south of the Hill of Corruption--the ones Solomon7 king of Israel had built for Ashtoreth the vile goddess of the Sidonians, for Chemosh the vile god of Moab, and for Molech the detestable8 god of the people of Ammon.9
References for 2 Kings 23:13
Josiah smashed10 the sacred stones and cut down the Asherah poles and covered the sites with human bones.
References for 2 Kings 23:14
Even the altar11 at Bethel, the high place made by Jeroboam12 son of Nebat, who had caused Israel to sin--even that altar and high place he demolished. He burned the high place and ground it to powder, and burned the Asherah pole also.
References for 2 Kings 23:15
Then Josiah13 looked around, and when he saw the tombs that were there on the hillside, he had the bones removed from them and burned on the altar to defile it, in accordance14 with the word of the LORD proclaimed by the man of God who foretold these things.
References for 2 Kings 23:16
The king asked, "What is that tombstone I see?" The men of the city said, "It marks the tomb of the man of God who came from Judah and pronounced against the altar of Bethel the very things you have done to it."
"Leave it alone," he said. "Don't let anyone disturb his bones15." So they spared his bones and those of the prophet16 who had come from Samaria.
References for 2 Kings 23:18
Just as he had done at Bethel, Josiah removed and defiled all the shrines at the high places that the kings of Israel had built in the towns of Samaria that had provoked the LORD to anger
Josiah slaughtered17 all the priests of those high places on the altars and burned human bones18 on them. Then he went back to Jerusalem.
References for 2 Kings 23:20
The king gave this order to all the people: "Celebrate the Passover19 to the LORD your God, as it is written in this Book of the Covenant."
References for 2 Kings 23:21