occurs in Authorized Version, James 5:16 . The Revised Version renders appropriately: "The supplication of a righteous man availeth much in its working", i.e., "it moves the hand of Him who moves the world."
These dictionary topics are from
M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition,
published by Thomas Nelson, 1897. Public Domain, copy freely.
Bibliography InformationEaston, Matthew George. "Entry for Effectual prayer". "Easton's Bible Dictionary". .