Divrey Hayamim Alef 21:15

And HaElohim sent a Malach unto Yerushalayim to destroy her, and as he was destroying, HASHEM beheld, and He relented Him of the ra'ah, and said to the Malach that destroyed, It is enough, stay now thine yad. And the Malach HASHEM stood by the goren (threshing floor) of Ornan the Yevusi.