Nehemiah 11:17-19

and Mattaniah the son of Mica, the son of Zabdi, the son of Asaph, who was the leader in beginning the thanksgiving at prayer, and Bakbukiah, the second among his brethren; and Abda the son of Shammua, the son of Galal, the son of Jeduthun. All the Levites in the holy city were 284. Also the gatekeepers, Akkub, Talmon and their brethren who kept watch at the gates, were 172.