Nehemiah 6:15-17

15So the wall was finished on the twenty-fifth day of Elul, in fifty-two days.

16And it happened, when all our enemies heard of it, and all the nations around us saw these things, that they were very disheartened in their own eyes; for they perceived that this work was done by our God.

17Also in those days the nobles of Judah sent many letters to Tobiah, and the letters of Tobiah came to them.