Third Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
11:15cum enim esset David in Idumea et ascendisset Ioab princeps militiae ad sepeliendos eos qui fuerant interfecti et occidisset omne masculinum in Idumea
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.