King James Version (KJV) - 2 Kings 23:12 >

And the altars that [were] on the top of the upper chamber of Ahaz, which the kings of Judah had made, and the altars which Manasseh had made in the two courts of the house of the LORD, did the king beat down, and brake [them] down from thence, and cast the dust of them into the brook Kidron.

Berean Study Bible (BSB) - 2 Kings 23:12 >

He pulled down the altars that the kings of Judah had set up on the roof near the upper chamber of Ahaz, and the altars that Manasseh had set up in the two courtyards of the house of the LORD. The king pulverized them there and threw their dust into the Kidron Valley.