From Sahih Muslim (Hadith 7068):
Abdullah said that five signs have (become things) of the past (and have proved the truth of the Holy Prophet):(Enveloping) by the smoke, inevitable (punishment to the Meccans at Badr), (the victory of) Rome, (violent) seizing (of the Meccans at Badr) and (the splitting up of) the Moon
Reference: Muslim 7068