David lifted up his eyes, and saw the angel of Yahweh standing between earth and the sky, having a drawn sword in his hand stretched out over Jerusalem. Then David and the elders, clothed in sackcloth, fell on their faces.
And God was displeased with this thing; therefore he smote Israel. And David said unto God, I have sinned greatly, because I have done this thing: but now, I beseech thee, do away the iniquity of thy servant; for I have done very foolishly ( 1 Chronicles 21:7-8 ).