Sahih Bukhari | Volume 5 | Hadith Number 2
Narrated by Imran bin Husain
Allah's Apostle 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 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 fulfil their vows, and fatness will appear among them."