Kommentar zu Bereschit 19:22

כי לא אוכל לעשות FOR I CANNOT DO [ANY THING]—This admission of their powerlessness was the angels’ punishment for having said, (v. 13) “For we will destroy the city”, attributing the act to themselves; therefore they could not go away from there (i. e., the incident could not close) until they were compelled to admit that the thing was not in their power) (Genesis Rabbah 50:9).

מהר..כי לא אוכל, because I have been commanded not to destroy the region until you have been saved.

From this you can learn that one destroys and the other rescues... But v. 17 does not prove this. Although it is written there, “He [the one angel] said, ‘Escape for your life,’” and it is not written, “They said,” it could be that only one angel rescued, but they both overturned.