Nehemiah 6:17

Moreover, in those days
While the wall was building:

the nobles of Judah sent many letters to Tobiah, and the letters of
Tobiah came unto them;
letters passed between them frequently, they informing him how things went on at Jerusalem, and he advising them to what was detrimental to the true interest of their nation; such false friends had Nehemiah about him, and yet the work succeeded under him; which showed it the more to be of God.