John Wesley on 1 Chronicles 9:21

Was - In the time of David, as the following verse sheweth. Porter - Chief porter. The door - Of the door which led out of the priests court into the tabernacle, in which the ark was placed. Before the temple was built, they had a mean and moveable tent, which they made use of in the mean time. They that cannot yet have a temple, let them be thankful for a tabernacle, and make the best use of it. Never let God's work be left undone, for want of a place to do it in.