'Porters' in the Bible

And he appointed, according to the order of David his father, the courses of the priests to their service, and the Levites to their charges, to praise and minister before the priests, as the duty of every day required: the porters also by their courses at every gate: for so had David the man of God commanded.

This is the thing that ye shall do; A third part of you entering on the sabbath, of the priests and of the Levites, shall be porters of the doors;

And he set the porters at the gates of the house of the LORD, that none which was unclean in any thing should enter in.

Also they were over the bearers of burdens, and were overseers of all that wrought the work in any manner of service: and of the Levites there were scribes, and officers, and porters.

And the singers the sons of Asaph were in their place, according to the commandment of David, and Asaph, and Heman, and Jeduthun the king's seer; and the porters waited at every gate; they might not depart from their service; for their brethren the Levites prepared for them.