1 Chronicles 21:20 in the World English Bible
Ornan turned back and saw the angel; and his four sons who were with him hid themselves. Now Ornan was threshing wheat.
Context
19 And David went up at the saying of Gad, which he spake in the name of the LORD.
20 And Ornan turned back, and saw the angel; and his four sons with him hid themselves. Now Ornan was threshing wheat.
21 And as David came to Ornan, Ornan looked and saw David, and went out of the threshingfloor, and bowed himself to David with his face to the ground.