Nehemiah 2:13

2:13 I proceeded through the Valley Gate by night, in the direction of the Well of the Dragons and the Dung Gate, inspecting the walls of Jerusalem that had been breached and its gates that had been destroyed by fire.

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.