First Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
Chapter 12
19porro de Manasse transfugerunt ad David quando veniebat cum Philisthim adversum Saul ut pugnaret et non dimicavit cum eis quia inito consilio remiserunt eum principes Philisthinorum dicentes periculo capitis nostri revertetur ad dominum suum Saul
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.