Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
9:6non credebam narrantibus donec ipsa venissem et vidissent oculi mei et probassem vix medietatem mihi sapientiae tuae fuisse narratam vicisti famam virtutibus tuis
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.