1 Chronicles 21:19-21

New American Standard Bible

¹⁹ So David went up at the word of Gad, which he spoke in the name of the Lord. ²⁰ Now Ornan turned back and saw the angel, and his four sons who were with him hid themselves. And Ornan was threshing wheat. ²¹ As David came to Ornan, Ornan looked and saw David, and went out from the threshing floor and prostrated himself to David with his face to the ground.