"The Levites are to station themselves around the king, each with weapon in hand. Anyone who enters the temple is to be put to death. Stay close to the king wherever he goes."
NIV
And the Levites shall surround the young king, every man with his weapons in his hand; and whoever comes into the house [breaking through the ranks of the guard to get near Joash] shall be put to death. But you be with the king when he comes in [from the temple chamber where he is hiding] and when he goes out.
AMP
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.
KJV