1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
29:1Furthermore David the king said unto all the congregation, Solomon my son, whom alone God hath chosen, is yet young and tender, and the work is great: for the palace is not for man, but for the LORD God.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.