Nehemia 1:7

1:7 We have behaved corruptly against you, not obeying the commandments, the statutes, and the judgments that you commanded your servant Moses.

Nehemia 7:1

7:1 When the wall had been rebuilt and I had positioned the doors, and the gatekeepers, the singers, and the Levites had been appointed,

Nehemia 12:30

12:30 When the priests and Levites had purified themselves, they purified the people, the gates, and the wall.