1 Chronicles 21:19-21

Revised Standard Version

¹⁹ So David went up at Gad’s word, which he had spoken in the name of the Lord. ²⁰ Now Ornan was threshing wheat; he turned and saw the angel, and his four sons who were with him hid themselves. ²¹ As David came to Ornan, Ornan looked and saw David and went forth from the threshing floor, and did obeisance to David with his face to the ground.