Five prayers during the day and the night. (Upon this he said: Am I obliged to say any other (prayer) besides these? He (the Holy Prophet, ) said: No, but whatever you observe voluntarily, out of your own free will, and the fasts of Ramadan. The inquirer said: Am I obliged to do anything else besides this? He (the Holy Prophet) said: No, but whatever you do out of your own free will. And the Messenger of Allah told him about the Zakat (poor-rate). The inquirer said: Am I obliged to pay anything else besides this? He (the Holy Prophet) said: No, but whatever you pay voluntarily out of your own free will. The man turned back and was saying: I would neither make any addition to this, nor will decrease anything out of it. The Prophet remarked: He is successful, if he is true to what he affirms.  

أَنَّهُ سَمِعَ طَلْحَةَ بْنَ عُبَيْدِ اللَّهِ يَقُولُ جَاءَ رَجُلٌ إِلَى رَسُولِ اللَّهِ ﷺ مِنْ أَهْلِ نَجْدٍ ثَائِرُ الرَّأْسِ نَسْمَعُ دَوِيَّ صَوْتِهِ وَلاَ نَفْقَهُ مَا يَقُولُ حَتَّى دَنَا مِنْ رَسُولِ اللَّهِ ﷺ فَإِذَا هُوَ يَسْأَلُ عَنِ الإِسْلاَمِ فَقَالَ رَسُولُ اللَّهِ ﷺ خَمْسُ صَلَوَاتٍ فِي الْيَوْمِ وَاللَّيْلَةِ فَقَالَ هَلْ عَلَىَّ غَيْرُهُنَّ قَالَ لاَ إِلاَّ أَنْ تَطَّوَّعَ وَصِيَامُ شَهْرِ رَمَضَانَ فَقَالَ هَلْ عَلَىَّ غَيْرُهُ فَقَالَ لاَ إِلاَّ أَنْ تَطَّوَّعَ وَذَكَرَ لَهُ رَسُولُ اللَّهِ ﷺ الزَّكَاةَ فَقَالَ هَلْ عَلَىَّ غَيْرُهَا قَالَ لاَ إِلاَّ أَنْ تَطَّوَّعَ قَالَ فَأَدْبَرَ الرَّجُلُ وَهُوَ يَقُولُ وَاللَّهِ لاَ أَزِيدُ عَلَى هَذَا وَلاَ أَنْقُصُ مِنْهُ فَقَالَ رَسُولُ اللَّهِ ﷺ أَفْلَحَ إِنْ صَدَقَ  

By his father, he shall succeed if he were true (to what he professed), or: By his father, he would enter heaven if he were true (to what he professed).  

عَنِ النَّبِيِّ ﷺ بِهَذَا الْحَدِيثِ نَحْوَ حَدِيثِ مَالِكٍ غَيْرَ أَنَّهُ قَالَ فَقَالَ رَسُولُ اللَّهِ ﷺ أَفْلَحَ وَأَبِيهِ إِنْ صَدَقَ أَوْ دَخَلَ الْجَنَّةَ وَأَبِيهِ إِنْ صَدَقَ