Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
20:26die autem quarto congregati sunt in valle Benedictionis etenim quoniam ibi benedixerant Domino vocaverunt locum illum vallis Benedictionis usque in praesentem diem
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.