Third Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
20:31dixeruntque ei servi sui ecce audivimus quod reges domus Israhel clementes sint ponamus itaque saccos in lumbis nostris et funiculos in capitibus nostris et egrediamur ad regem Israhel forsitan salvabit animas nostras
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.