A group of three men came to the houses of the wives of the Prophet ﷺ asking how the Prophet ﷺ worshipped (Allah), and when they were informed about that, they considered their worship insufficient and said, "Where are we from the Prophet ﷺ as his past and future sins have been forgiven." Then one of them said, "I will offer the prayer throughout the night forever." The other said, "I will fast throughout the year and will not break my fast." The third said, "I will keep away from the women and will not marry forever." Messenger of Allah ﷺ came to them and said, "Are you the same people who said so-and-so? By Allah, I am more submissive to Allah and more afraid of Him than you; yet I fast and break my fast, I do sleep and I also marry women. So he who does not follow my tradition in religion, is not from me (not one of my followers). (Using translation from Bukhārī 5063)
جَاءَ ثَلَاثَةُ رَهْطٍ إِلَى أَزْوَاجِ النَّبِيِّ ﷺ يَسْأَلُونَ عَنْ عِبَادَةِ النَّبِيِّ ﷺ فَلَمَّا أُخْبِرُوا بِهَا كَأَنَّهُمْ تَقَالُّوهَا فَقَالُوا وَأَيْنَ نَحْنُ مِنَ النَّبِيِّ ﷺ وَقَدْ غَفَرَ اللهُ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ وَمَا تَأَخَّرَ؟ فَقَالَ أَحَدُهُمْ أَمَّا أَنَا فَأُصَلِّي اللَّيْلَ أَبَدًا وَقَالَ الْآخَرُ إِنِّي أَصُومُ الدَّهْرَ فَلَا أُفْطِرُ وَقَالَ الْآخَرُ أَنَا أَعْتَزِلُ النِّسَاءَ وَلَا أَتَزَوَّجُ أَبَدًا فَجَاءَ النَّبِيُّ ﷺ إِلَيْهِمْ فَقَالَ أَنْتُمُ الَّذِينَ قُلْتُمْ كَذَا وَكَذَا أَمَا إِنِّي لَأَخْشَاكُمْ لِلَّهِ ﷻ وَأَتْقَاكُمْ لَهُ لَكِنِّي أَصُومُ وَأُفْطِرُ وَأُصَلِّي وَأَرْقُدُ وَأَتَزَوَّجُ النِّسَاءَ فَمَنْ رَغِبَ عَنْ سُنَّتِي فَلَيْسَ مِنِّي