Keil & Delitzsch, on 1Chr 9:21

“And Zacharias the son of Mosollamia, was porter of the gate of the tabernacle of the testimony:”

“So they and their children had the oversight of the gates of the house of the Lord,.... They that were appointed in David's time to watch the gates of the temple, their posterity succeeded them in that office; for it was hereditary: namely, the house of the tabernacle, by wards; that which was at Gibeon in David's time, and now one was erected until the temple was built.”

Imported from an open dataset — not yet checked against the printed edition.