2 Kings 11:7

And two parts of all you that go forth R.V. And the two companies of you, even all that go forth. All those men who were going off duty at the palace were to divide themselves into two bodies, and go and serve at the temple to protect the king. The -of you" refers to the purely military body, as in verse 5. We see in verse 2 that their duty was outside the temple building, while the narrative in Chronicles in almost identical language appoints the Levites for duty within the temple.