First Book of Paralipomenon (Author Compiled by Isaias and Esdras from records of Nathan, Gad, Addo, Ahias, Jehu and others.)
15:2tunc dixit David inlicitum est ut a quocumque portetur arca Dei nisi a Levitis quos elegit Dominus ad portandum eam et ad ministrandum sibi usque in aeternum
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.