ﻧﻭﺮ ﺠﻨﺔ ﻋﺎﻠﻴﺔ ﺠﻤﺎﻠﻲ

On the authority of Abu ‘Amr, though others call him Abu ‘Amrah Sufyan bin
        ‘Abdullah, radiyallahu anhu, who said:

I said: "O Messenger of Allah, tell me something
          about Islam which I could not ask anyone about save you." He answered:
          "Say: ‘I believe in Allah’, and then stand firm and steadfast."

       

[Muslim]