Rashi on Genesis 19:21/רש"י על בראשית י״ט:כ״א

1גם לדבר הזה CONCERNING THIS THING ALSO — Not only will you be saved, but I will also save the whole city for Your sake.

2הפכי means I OVERTHROW, just as (48:5) “until I come (בואי) , and (16:13) “after I have seen (רואי)” and (Jeremiah 31:19) “whenever I speak (דברי) of him)”.