Sahih Muslim
The Book Pertaining to Paradise, Its Description, Its Bounties and Its Intimates (Kitab Al-Jannat wa Sifat Naimiha wa Ahliha)
Book Number: 040 / Hadith Number: 6791
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: The people most loved by me from amongst my Ummah would be those who would come after me but everyone amongst them would have the keenest desire to catch a glimpse of me even at the cost of his family and wealth.