Compare 2 Kings 11:8, 2 Kings 11:11. The soldiers and the Levites in the temple were probably intermixed in about equal proportions.
Related Commentaries of 2 Chronicles 23:7
2 Chronicles 23:7
7 And the Levites shall compass the king round about, every man with his weapons in his hand; and whosoever else cometh into the house, he shall be put to death: but be ye with the king when he cometh in, and when he goeth out.