Nehemiah 2:13-16

And I went out by night by the gate of the valley, even before the dragon well, and to the dung port, and viewed the walls of Jerusalem, which were broken down, and the gates thereof were consumed with fire. Then I went on to the gate of the fountain, and to the king's pool: but there was no place for the beast that was under me to pass. Then went I up in the night by the brook, and viewed the wall, and turned back, and entered by the gate of the valley, and so returned. And the rulers knew not whither I went, or what I did; neither had I as yet told it to the Jews, nor to the priests, nor to the nobles, nor to the rulers, nor to the rest that did the work.