Sayyiduna Abu Hurayrah (may Allah be pleased with him) said that a Bedouin came to the Prophet (peace and blessings be upon him) and said: Tell me of a deed which, if I do it, I will enter Paradise. He (peace and blessings be upon him) said: "Worship Allah and do not associate anything with Him, establish the prayer, meaning the obligatory one, pay the obligatory zakah, and fast Ramadan." He said: By the One who sent you with the truth, I will not do more than this. When he had left, he (peace and blessings be upon him) said: "Whoever wishes to see a man of the people of Paradise, let him look at this man."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الزكاة / 7237