Sahih Muslim Book - 1, Hadith - 107

و حَدَّثَنِي أَبُو بَكْرِ بْنُ إِسْحَاقَ حَدَّثَنَا عَفَّانُ حَدَّثَنَا وُهَيْبٌ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ عَنْ أَبِي زُرْعَةَ عَنْ أَبِي هُرَيْرَةَ أَنَّ أَعْرَابِيًّا جَاءَ إِلَى رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ يَا رَسُولَ اللَّهِ دُلَّنِي عَلَى عَمَلٍ إِذَا عَمِلْتُهُ دَخَلْتُ الْجَنَّةَ قَالَ تَعْبُدُ اللَّهَ لَا تُشْرِكُ بِهِ شَيْئًا وَتُقِيمُ الصَّلَاةَ الْمَكْتُوبَةَ وَتُؤَدِّي الزَّكَاةَ الْمَفْرُوضَةَ وَتَصُومُ رَمَضَانَ قَالَ وَالَّذِي نَفْسِي بِيَدِهِ لَا أَزِيدُ عَلَى هَذَا شَيْئًا أَبَدًا وَلَا أَنْقُصُ مِنْهُ فَلَمَّا وَلَّى قَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ سَرَّهُ أَنْ يَنْظُرَ إِلَى رَجُلٍ مِنْ أَهْلِ الْجَنَّةِ فَلْيَنْظُرْ إِلَى هَذَا.

It was narrated from Abu Hurairah that a Bedouin came to the Messenger of Allah (s.a.w) and said: "O Messenger of Allah, tell me of a deed which, if I do it, I will enter Paradise." He said: "Worship Allah and do not associate anything with Him, establish the prescribed Salat, pay the obligatory Zakat and observe fast (in the month of) Ramadan." He said: "By the One in Whose Hand is my soul! I shall never do any more than that or any less." When he turned to leave, the Prophet (s.a.w) said: "Whoever would like to see a man from the people of Paradise, let him look at this man."