'Keepers' in the Bible

All Israel in the time of Zerubbabel and in the time of Nehemiah gave allotments to each of the singers and gate keepers on a daily basis, setting them apart to benefit the descendants of Levi. And the descendants of Levi set them apart to benefit the descendants of Aaron.

had prepared a great chamber for him, in the place where they used to place the grain offerings, incense, and vessels, along with the tithes of the grain, the new wine, and the oil that was mandated for the descendants of Levi, the singers, the gate keepers, and the priests' offerings.

Then I commanded the descendants of Levi to purify themselves and to come as gate keepers to sanctify the Sabbath day. Remember me, my God, and show mercy to me according to the greatness of your gracious love.