2 Chronicles 29:16

And the priests went into the inner part of the house of the Lord, within the Sanctuary and especially within the veil, where the Levites were not permitted to enter, to cleanse it, and brought out all the uncleanness that they found in the Temple of the Lord, whatever idolatrous vessels and remains of idolatrous offerings they found, into the court of the house of the Lord. And the Levites took it to carry it out abroad into the brook Kidron, where the uncleanness could be burned and the ashes swept down with the winter rains into the Dead Sea.