Translations
They kept the charge of their God and the charge of purification, as did the singers and the gatekeepers, in accordance with the commands of David and his son Solomon.
They kept the charge of their Elohim and the charge of the purification, and so did the singers and gatekeepers, according to the command of David and his son Shlomo.
And both the singers and the porters kept the ward of their God, and the ward of the purification, according to the commandment of David, and of Solomon his son.
They performed the service of their God and the service of purification, along with the singers and gatekeepers, as David and his son Solomon had prescribed.