Before they lay down, the men of the city — the men of Sodom — surrounded the house, both young and old, all the people from every quarter.
Genesis 19:4 (NASB)
Genesis 19 identifies the city of Sodom twice in verse 1, so when verse 4 uses this phrase "the men of the city, the men of Sodom," the rabbis tell us that this is hint from Torah.
The focus is "men of the city," and that's meant to tie us back to the great wicked city of Babel.