C. F. Keil and Franz Delitzsch on 2 Chronicles 23:7

2Ch 23:7 “And the Levites shall compass the king round about, each with his weapons in his hand.” The Levites are the bodies of guards mentioned in 2Ch 23:4, 2Ch 23:5. If we keep that in view, then the following words, “every one who cometh into the house shall be put to death,” say the same as the words, “every one who cometh within the ranks” (2Ki 11:8). A contradiction arises only if we misinterpret הקּיפוּ, and understand it of the forming of a circle around the king; whereas הקּיפוּ, like הקּפתּם (Kings), is to be understood, according to the context, of the setting of the guards both at the temple gate and in the courts, so that whoever entered the court of the temple came within the ranks of the guards thus placed.