Albert Barnes Commentary Nehemiah 9:4

"Then stood up upon the stairs of the Levites, Jeshua, and Bani, Kadmiel, Shebaniah, Bunni, Sherebiah, Bani, [and] Chenani, and cried with a loud voice unto Jehovah their God." — Nehemiah 9:4 (ASV)

The Septuagint and the Vulgate remove the comma after "stairs." The "stairs (or scaffold) of the Levites" is to be understood as an elevated platform from which they could better address and lead the people .