Musnad Ahmad 30:1395

'Affan narrated to us, Wuhayb narrated to us, Yahya ibn Sa'id—who is Abu Hayyan al-Taymi—narrated to us, from Abu Zur'ah, from Abu Hurayrah, that a Bedouin came to the Prophet, may Allah bless him and grant him peace, and said: "O Messenger of Allah, guide me to a deed that, if I perform it, I will enter Paradise." He said: "Worship Allah, associating nothing with Him, establish the prescribed prayer, pay the obligatory zakat, and fast Ramadan." He said: "By Him in whose hand is my soul, I will never add anything to this, nor will I decrease anything from it." When he turned away, the Prophet, may Allah bless him and grant him peace, said: "Whoever is pleased to look at a man from the people of Paradise, let him look at this one."