[Machine] That a woman came to the Prophet ﷺ and said, "O Messenger of Allah, I have vowed to strike you on the head with a tambourine." He said, "Fulfill your vow." The scholar, may Allah have mercy on him, said, "It is similar to if it were that he ﷺ only allowed her to strike him because it is a permissible matter and it shows joy at the appearance of the Messenger of Allah ﷺ and his safe return. It is not obligatory to fulfill the vow and Allah knows best."  

أَنَّ امْرَأَةً أَتَتِ النَّبِيَّ ﷺ فَقَالَتْ يَا رَسُولَ اللهِ إِنِّي نَذَرْتُ أَنْ أَضْرِبَ عَلَى رَأْسِكَ بِالدُّفِّ فَقَالَ أَوْفِي بِنَذْرِكَ قَالَ الشَّيْخُ رَحِمَهُ اللهُ يُشْبِهُ أَنْ يَكُونَ ﷺ إِنَّمَا أَذِنَ لَهَا فِي الضَّرْبِ لِأَنَّهُ أَمْرٌ مُبَاحٌ وَفِيهِ إِظْهَارُ الْفَرَحِ بِظُهُورِ رَسُولِ اللهِ ﷺ وَرُجُوعِهِ سَالِمًا لَا أَنَّهُ يَجِبُ بِالنَّذْرِ وَاللهُ أَعْلَمُ