Nehemiah 4:22

4:22 At that time I instructed the people, “Let every man and his coworker spend the night in Jerusalem and let them be guards for us by night and workers by day.

Nehemiah 13:21

13:21 But I warned them and said, “Why do you spend the night by the wall? If you repeat this, I will forcibly remove you!” From that time on they did not show up on the Sabbath.