1 Chronicles 21:19-21

New King James Version

¹⁹ So David went up at the word of Gad, which he had spoken in the name of the Lord. ²⁰ Now Ornan turned and saw the angel; and his four sons who were with him hid themselves, but Ornan continued threshing wheat. ²¹ So David came to Ornan, and Ornan looked and saw David. And he went out from the threshing floor, and bowed before David with his face to the ground.