'Guard' in the Bible

Also, at that time I said to the people, 'Let each with his servant lodge in the midst of Jerusalem, and they have been to us by night a guard, and by day for the work:'

and there are none -- I and my brethren and my servants, the men of the guard who are after me -- there are none of us putting off our garments, each hath his vessel of water.

and I say to them, 'Let not the gates of Jerusalem be opened till the heat of the sun, and while they are standing by let them shut the doors, and fasten, and appoint guards of the inhabitants of Jerusalem, each in his guard, and each over-against his house.'