When they had brought them outside, one said, “Escape for your life! Do not look behind you, and do not stay anywhere in the surrounding area; escape to the mountains, or you will be swept away.”
Genesis 19:17 (NASB)
There’s a fascinating view in the Jewish commentaries regarding angels:
An angel can only do the ONE thing it was tasked with doing: rescue, heal, bless, destroy, etc. Just one thing. That’s why two were sent in Gen 19. One to rescue Lot, and one to destroy the cities.
ויחזיקו AND THE MEN LAID HOLD [UPON HIS HAND]– One of these was commissioned to rescue him whilst his fellow was to overthrow Sodom; that is why it is stated (v. 17) “And he said, escape”, and it is not stated “And they said” (Genesis Rabbah 50:11).
Rashi on Genesis 19:16:1
And here as well:
ויוציאה, “they took him outside;” there is a letter ו missing before letter ה, to hint that only one angel, i.e. ויוציא, singular, the angel Gavriel, had been charged with the task of saving Lot.
Chizkuni on Genesis 19:16