Jamieson, Fausset and Brown on Nehemiah 2:16-18

16-18. the rulers knew not--The following day, having assembled the elders, Nehemiah produced his commission and exhorted them to assist in the work. The sight of his credentials, and the animating strain of his address and example, so revived their drooping spirits that they resolved immediately to commence the building, which they did, despite the bitter taunts and scoffing ridicule of some influential men.