Fourth Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
2:24qui cum se respexisset vidit eos et maledixit eis in nomine Domini egressique sunt duo ursi de saltu et laceraverunt ex eis quadraginta duos pueros
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.