Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
6:26si clauso caelo pluvia non fluxerit propter peccata populi et deprecati te fuerint in loco isto et confessi nomini tuo et conversi a peccatis suis cum eos adflixeris
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.