In the house of God, i.e. in the courts of the temple. I, and the half of the rulers with me; and Ezra, and the other half with him, as appears by comparing this with Nehemiah 12:31,36.
Related Commentaries of Nehemiah 12:40
Nehemiah 12:40
40 So stood the two companies of them that gave thanks in the house of God, and I, and the half of the rulers with me: