Fourth Book of Kings (Author Compiled by Isaias and Jeremias from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
5:13accesserunt ad eum servi sui et locuti sunt ei pater si rem grandem dixisset tibi propheta certe facere debueras quanto magis quia nunc dixit tibi lavare et mundaberis
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.