Both the singers and the gatekeepers kept the charge of their God and the charge of the purification, according to the command of David and Solomon his son.
Nehemiah 12:45
Surrounding context
12:44 And at the same time some were appointed over the rooms of the storehouse for the offerings, the firstfruits, and the tithes, to gather into them from the fields of the cities the portions specified by the Law for the priests and Levites; for Judah rejoiced over the priests and Levites who ministered.
12:45 Both the singers and the gatekeepers kept the charge of their God and the charge of the purification, according to the command of David and Solomon his son.
12:46 For in the days of David and Asaph of old there were chiefs of the singers, and songs of praise and thanksgiving to God.