'Watches' in the Bible

And I said unto them, Let not the gates of Jerusalem be opened until the sun be hot; and while they stand on guard , let them shut the doors, and bar ye them: and appoint watches of the inhabitants of Jerusalem, every one in his watch, and every one to be over against his house.

Arise, cry out in the night, at the beginning of the watches; Pour out thy heart like water before the face of the Lord: Lift up thy hands toward him for the life of thy young children, that faint for hunger at the head of every street.