Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
30:8nolite indurare cervices vestras sicut patres vestri tradite manus Domino et venite ad sanctuarium eius quod sanctificavit in aeternum servite Domino Deo patrum vestrorum et avertetur a vobis ira furoris eius
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.