Sahih Muslim
The Book Pertaining to the Turmoil and Portents of the Last Hour (Kitab Al-Fitan wa Ashrat As-Saah)
Book Number: 041 / Hadith Number: 6945
'A'isha reported: I heard Allah's Messenger (may peace be upon him) as saying: The (system) of night and day would not end until the people have taken to the worship of Lat and 'Uzza. I said: Allah's Messenger, I think when Allah has revealed this verse:" He it is Who has sent His Messenger with right guidance, and true religion, so that He may cause it to prevail upon all religions, though the polytheists are averse (to it)" (ix. 33), it implies that (this promise) is going to be fulfilled. Thereupon he (Allah's Apostle) said: It would happen as Allah would like. Then Allah would send the sweet fragrant air by which everyone who has even a mustard grain of faith in Him would die and those only would survive who would have no goodness in them. And they would revert to the religion of their forefathers.