Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
6:23tu audies de caelo et facies iudicium servorum tuorum ita ut reddas iniquo viam suam in caput proprium et ulciscaris iustum retribuens ei secundum iustitiam suam
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.