DS9: Move Along Home

[Sa'ar Chasm]

Isn't that the one with the ugly dress joke?

That was Sanctuary, I think. Millions of aliens come through the wormhole, and the universal translator magically doesn't work. Kira and the alien leader have a lengthy exchange of gibberish about a dress in a shop window on the Promenade, and after the translators start working, Kira buys it as a gift for said leader...

...who promptly says it was the ugliest thing she's ever seen.

It was a Kodak moment.