Sahih al-Bukhari 46
Narrated Talha bin 'Ubaidullah:
A man from Najd with unkempt hair came to Allah's Messenger (ﷺ) and we heard
     his loud voice but could not understand what he was saying, till he 
     came near and then we came to know that he was asking about Islam. 
     Allah's Messenger (ﷺ) said, "You have to offer prayers perfectly five times 
     in a day and night (24 hours)." The man asked, "Is there any more 
     (praying)?" Allah's Messenger (ﷺ) replied, "No, but if you want to offer the
     Nawafil prayers (you can)." Allah's Messenger (ﷺ) further said to him: "You 
     have to observe fasts during the month of Ramadan." The man asked, 
     "Is there any more fasting?" Allah's Messenger (ﷺ) replied, "No, but if you 
     want to observe the Nawafil fasts (you can.)" Then Allah's Messenger (ﷺ) 
     further said to him, "You have to pay the Zakat (obligatory charity)."
     The man asked, "Is there any thing other than the Zakat for me to 
     pay?" Allah's Messenger (ﷺ) replied, "No, unless you want to give alms of 
     your own." And then that man retreated saying, "By Allah! I will 
     neither do less nor more than this." Allah's Messenger (ﷺ) said, "If what he
     said is true, then he will be successful (i.e. he will be granted 
     Paradise)."
حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي مَالِكُ بْنُ أَنَسٍ، عَنْ عَمِّهِ أَبِي سُهَيْلِ بْنِ مَالِكٍ، عَنْ أَبِيهِ، أَنَّهُ سَمِعَ طَلْحَةَ بْنَ عُبَيْدِ اللَّهِ، يَقُولُ جَاءَ رَجُلٌ إِلَى رَسُولِ اللَّهِ صلى الله عليه وسلم مِنْ أَهْلِ نَجْدٍ، ثَائِرُ الرَّأْسِ، يُسْمَعُ دَوِيُّ صَوْتِهِ، وَلاَ يُفْقَهُ مَا يَقُولُ حَتَّى دَنَا، فَإِذَا هُوَ يَسْأَلُ عَنِ الإِسْلاَمِ فَقَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ‏"‏ خَمْسُ صَلَوَاتٍ فِي الْيَوْمِ وَاللَّيْلَةِ ‏"‏‏.‏ فَقَالَ هَلْ عَلَىَّ غَيْرُهَا قَالَ ‏"‏ لاَ، إِلاَّ أَنْ تَطَوَّعَ ‏"‏‏.‏ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ وَصِيَامُ رَمَضَانَ ‏"‏‏.‏ قَالَ هَلْ عَلَىَّ غَيْرُهُ قَالَ ‏"‏ لاَ، إِلاَّ أَنْ تَطَوَّعَ ‏"‏‏.‏ قَالَ وَذَكَرَ لَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم الزَّكَاةَ‏.‏ قَالَ هَلْ عَلَىَّ غَيْرُهَا قَالَ ‏"‏ لاَ، إِلاَّ أَنْ تَطَوَّعَ ‏"‏‏.‏ قَالَ فَأَدْبَرَ الرَّجُلُ وَهُوَ يَقُولُ وَاللَّهِ لاَ أَزِيدُ عَلَى هَذَا وَلاَ أَنْقُصُ‏.‏ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَفْلَحَ إِنْ صَدَقَ ‏"‏‏.‏