Second Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
6:19sed ad hoc tantum facta est ut respicias orationem servi tui et obsecrationem eius Domine Deus meus audias et preces quas fundit famulus tuus coram te
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.