سُنَنُ النَّسَائِيِّ
Sunan an-Nasa’i 3369
The Book of Marriage
Announcing The Wedding By Singing And Beating The Duff
أَخْبَرَنَا مُجَاهِدُ بْنُ مُوسَى، قَالَ حَدَّثَنَا هُشَيْمٌ، عَنْ أَبِي بَلْجٍ، عَنْ مُحَمَّدِ بْنِ حَاطِبٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَصْلُ مَا بَيْنَ الْحَلاَلِ وَالْحَرَامِ الدُّفُّ وَالصَّوْتُ فِي النِّكَاحِ .
It was narrated that Muhammad bin Hatib said: "The Messenger of Allah said: 'What differentiates between the lawful and the unlawful is the Duff, and the voice (singing) for the wedding.'"
Sunan an-Nasa'i, 3369hasan (Darussalam)