1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
21:18And the angel of Jehovah commanded Gad to say to David, that David should go up and rear an altar to Jehovah in the threshing-floor of Ornan the Jebusite.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.