"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