The Prophet ﷺ said, "Whoever vowed to be obedient to Allah, must be obedient to Him; and whoever vowed to be disobedient to Allah, should not be disobedient to Him."  

قَالَ النَّبِيُّ ﷺ مَنْ نَذَرَ أَنْ يُطِيعَ اللَّهَ فَلْيُطِعْهُ وَمَنْ نَذَرَ أَنْ يَعْصِيَهُ فَلاَ يَعْصِهِ  

The Prophet ﷺ said, "Allah is not in need of this man) torturing himself," when he saw the man walking between his two sons (who were supporting him).  

عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ اللَّهَ لَغَنِيٌّ عَنْ تَعْذِيبِ هَذَا نَفْسَهُ وَرَآهُ يَمْشِي بَيْنَ ابْنَيْهِ وَقَالَ الْفَزَارِيُّ عَنْ حُمَيْدٍ حَدَّثَنِي ثَابِتٌ عَنْ أَنَسٍ  

The Prophet ﷺ saw a man performing Tawaf around the Kaʿba, tied with a rope or something else (while another person was holding him). The Prophet ﷺ cut that rope off.  

أَنَّ النَّبِيَّ ﷺ رَأَى رَجُلاً يَطُوفُ بِالْكَعْبَةِ بِزِمَامٍ أَوْ غَيْرِهِ فَقَطَعَهُ  

While performing the Tawaf around the Kaʿba, the Prophet ﷺ passed by a person leading another person by a hair-rope nose-ring in his nose. The Prophet ﷺ cut the hair-rope nose-ring off with his hand and ordered the man to lead him by the hand.  

أَنَّ النَّبِيَّ ﷺ مَرَّ وَهْوَ يَطُوفُ بِالْكَعْبَةِ بِإِنْسَانٍ يَقُودُ إِنْسَانًا بِخِزَامَةٍ فِي أَنْفِهِ فَقَطَعَهَا النَّبِيُّ ﷺ بِيَدِهِ ثُمَّ أَمَرَهُ أَنْ يَقُودَهُ بِيَدِهِ  

While the Prophet ﷺ was delivering a sermon, he saw a man standing, so he asked about that man. They (the people) said, "It is Abu Israil who has vowed that he will stand and never sit down, and he will never come in the shade, nor speak to anybody, and will fast.'' The Prophet ﷺ said, "Order him to speak and let him come in the shade, and make him sit down, but let him complete his fast."  

بَيْنَا النَّبِيُّ ﷺ يَخْطُبُ إِذَا هُوَ بِرَجُلٍ قَائِمٍ فَسَأَلَ عَنْهُ فَقَالُوا أَبُو إِسْرَائِيلَ نَذَرَ أَنْ يَقُومَ وَلاَ يَقْعُدَ وَلاَ يَسْتَظِلَّ وَلاَ يَتَكَلَّمَ وَيَصُومَ فَقَالَ النَّبِيُّ ﷺ مُرْهُ فَلْيَتَكَلَّمْ وَلْيَسْتَظِلَّ وَلْيَقْعُدْ وَلْيُتِمَّ صَوْمَهُ قَالَ عَبْدُ الْوَهَّابِ حَدَّثَنَا أَيُّوبُ عَنْ عِكْرِمَةَ عَنِ النَّبِيِّ ﷺ