Sahih al-Bukhari Book 62, Hadith 1
"Allah's Messenger (ﷺ) said, "A time will come upon the people, when a group of people will wage a holy
war and it will be said, 'Is there amongst you anyone who has accompanied Allah's Messenger (ﷺ)?' They
will say, 'Yes.' And so victory will be bestowed on them. Then a time will come upon the people when
a group of people will wage a holy war, and it will be said, "Is there amongst you anynone who has
accompanied the companions of Allah's Messenger (ﷺ)?' They will say, 'Yes.' And so victory will be
bestowed on them. Then a time will come upon the people when a group of people will wage a holy
war, and it will be said, "Is there amongst you anyone who has been in the company of the
companions of the companions of Allah's Messenger (ﷺ) ?' They will say, 'Yes.' And victory will be
bestowed on them."
I said, "O Allah's Messenger (ﷺ)! I hear many narrations from you but I forget them." He said, "Spread your covering sheet." I spread my sheet and he moved both his hands as if scooping something and emptied them in the sheet and said, "Wrap it." I wrapped it round my body, and since then I have never forgotten.
"Allah's Messenger (ﷺ) said, 'The best of my followers are those living in my generation (i.e. my contemporaries). and then those who will follow the latter" `Imran added, "I do not remember whether he mentioned two or three generations after his generation, then the Prophet (ﷺ) added, 'There will come after you, people who will bear witness without being asked to do so, and will be treacherous and untrustworthy, and they will vow and never fulfill their vows, and fatness will appear among them."