Sahih Muslim
The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fadail Al-Sahabah)
Book Number: 031 / Hadith Number: 6166
Jabir b. 'Abdullah reported that Allah's Messenger (may peace be upon him) said: None amongst the created beings (from my Companions) would survive after one hundred years. Salim said: We made a mention of it to him (Jabir), whereupon he said: It means those who had been living on that day.