Nehemiah 2:12

And I arose in the night, I and some few men with me, just a few trusted attendants; neither told I any man what my God had put in my heart to do at Jerusalem, both the general plans and the special action that he had determined upon during the three days of his visit; neither was there any beast with me, save the beast that I rode upon. The survey of the ruined walls was to be made in all secrecy, lest the enemies, who had relatives in the city, might find out about it.