Amr bin Shu'ayb (may Allah have mercy on him) narrates from his father, and he from his grandfather (may Allah be pleased with him), that a woman came to the Prophet (peace and blessings be upon him) and said: "I have vowed to play the daff before you (peace and blessings be upon him)." He (peace and blessings be upon him) said: "Fulfil your vow."
The Shaykh (may Allah have mercy on him) said: It seems that he (peace and blessings be upon him) only permitted her to play it because it is a permissible matter, and in it there is a display of joy at the victory of the Messenger of Allah (peace and blessings be upon him) and his safe return, not because it becomes obligatory through the vow. And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النذور / 20102