"May the Force be with you" is perhaps the most iconic Star Wars quote, but running it close is surely "I've got a bad feeling about this."
The quote has appeared in every Star Wars film to date, with variations on the phrase spoken by Luke Skywalker and Han Solo in the original, Princess Leia in The Empire Strikes Back, C-3PO and Han in Return of the Jedi, Obi-Wan Kenobi in The Phantom Menace, Anakin in Attack of the Clones, Obi-Wan in Revenge of the Sith, K-2SO in Rogue One, and lastly Han again in The Force Awakens.
But what about The Last Jedi?
While "May the Force" is said a few times during the movie, there's no obvious instance the bad feeling line - even after a re-watch, it still isn't said, at least not in any language we can understand. Rian Johnson, however, insists it is in there.
The answer, then, is that it's spoken by BB-8, with one specific moment early on fitting perfectly. As pointed out by Adam Frazier on Twitter, it's probable the quote comes from the droid when he and Poe are attacking the First Order:
Since then, Johnson has confirmed (via Huff Post) that is where it happens. It certainly fits, and is an interesting new variation on the quote. It's also in keeping with Johnson's sense of humour, the passing of the guard, and the subversion of typical Star Wars tropes within the movie.