2 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
6:30then hear thou from the heavens, the settled place of thy dwelling, and forgive, and render unto every man according to all his ways, whose heart thou knowest (for thou, thou only, knowest the hearts of the children of men),
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.