The Role of Prayer
J. O. Fraser was a missionary to China in the early 1900s. He credited the conversion of hundreds of Lisu families to the prayers of his very earnest little prayer group back in England. He said, Christians at home can do as much for foreign missions as those actually on the field. It will only be known on the Last Day how much has been accomplished in missionary work by the prayers of earnest believers at home.
Morgan, R. J. (2000). Nelson's complete book of stories, illustrations, and quotes (electronic ed.) (568). Nashville: Thomas Nelson Publishers.
Pr 15:29 The LORD is far from the wicked: but he heareth the prayer of the righteous.