Sahih Bukhari
Oneness, Uniqueness of Allah (Tawheed)
Volume: 009 / Book Number: 093 / Hadith Number: 551
Narrated Al-Mughira bin Shu'ba:
I heard the Prophet saying, "Some people from my followers will continue to be victorious over others till Allah's Order (The Hour) is established." (See Hadith No. 414)