"The Messenger of Allah passed by a man who was leading another man by a rope. The Prophet took it, and cut it, and he said: 'It is a vow.'"  

مَرَّ رَسُولُ اللَّهِ ﷺ بِرَجُلٍ يَقُودُ رَجُلاً فِي قَرَنٍ فَتَنَاوَلَهُ النَّبِيُّ ﷺ فَقَطَعَهُ قَالَ إِنَّهُ نَذْرٌ  

"The Prophet passed by a man who was circumambulating the Ka'bah, led by another man with a reign in his nose. The Prophet took him by the hand and commanded him to lead him by his hand." Ibn Juraij said: "Sulaiman told me that Tawus told him, from Ibn 'Abbas, that the Prophet passed by him when he was circumambulating the Ka'bah, and a man had tied his hand to another man with some string or thread or whatever. The Prophet cut it with his hand then said: 'Lead him with your hand.'"  

أَنَّ النَّبِيَّ ﷺ مَرَّ بِرَجُلٍ وَهُوَ يَطُوفُ بِالْكَعْبَةِ يَقُودُهُ إِنْسَانٌ بِخِزَامَةٍ فِي أَنْفِهِ فَقَطَعَهُ النَّبِيُّ ﷺ بِيَدِهِ ثُمَّ أَمَرَهُ أَنْ يَقُودَهُ بِيَدِهِ قَالَ ابْنُ جُرَيْجٍ وَأَخْبَرَنِي سُلَيْمَانُ أَنَّ طَاوُسًا أَخْبَرَهُ عَنِ ابْنِ عَبَّاسٍ أَنَّ النَّبِيَّ ﷺ مَرَّ بِهِ وَهُوَ يَطُوفُ بِالْكَعْبَةِ وَإِنْسَانٌ قَدْ رَبَطَ يَدَهُ بِإِنْسَانٍ آخَرَ بِسَيْرٍ أَوْ خَيْطٍ أَوْ بِشَىْءٍ غَيْرِ ذَلِكَ فَقَطَعَهُ النَّبِيُّ ﷺ بِيَدِهِ ثُمَّ قَالَ قُدْهُ بِيَدِكَ