'Ward' in the Bible

And the chief of the Levites: Hashabiah, Sherebiah, and Jeshua the son of Kadmiel, with their brethren over against them, to praise and to give thanks, according to the commandment of David the man of God, ward over against ward.

Mattaniah, and Bakbukiah, Obadiah, Meshullam, Talmon, Akkub, were porters keeping the ward at the thresholds of the gates.

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.