James 5:15-20

and the prayer of faith shall save him that is sick, and the Lord shall raise him up; and if he have committed sins, it shall be forgiven him. Confess therefore your sins one to another, and pray one for another, that ye may be healed. The supplication of a righteous man availeth much in its working. Elijah was a man of like passions with us, and he prayed fervently that it might not rain; and it rained not on the earth for three years and six months. And he prayed again; and the heaven gave rain, and the earth brought forth her fruit. My brethren, if any among you err from the truth, and one convert him; let him know, that he who converteth a sinner from the error of his way shall save a soul from death, and shall cover a multitude of sins.