"The Messenger of Allab passed by a man who was leading another man with something that he had stipulated in a vow. The Prophet took it and broke it, and he said: 'It is a vow.'" (Sahih) Chatper 136. It Is Permissible To Speak During Tawaf (Using translation from Nasāʾī 2921)
مَرَّ رَسُولُ اللهِ ﷺ بِرَجُلٍ يَقُودُ رَجُلًا فِي نَذْرٍ فَتَنَاوَلَهُ النَّبِيُّ ﷺ فَقَطَعَهُ فَقَالَ «إِنَّهُ نَذَرَ»