Sunan an-Nasa'i #3369 · The Book of Marriage

Sunan an-Nasa'iIt was narrated that Muhammad bin Hatib said
Sunan an-Nasa'i · Book 26 · The Book of Marriage
Sunan an-Nasa'i · كتاب 26 · كتاب النكاح
"The Messenger of Allah said: 'What differentiates between the lawful and the unlawful is the Duff, and the voice (singing) for the wedding
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 ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 3369In-book reference : Book 26, Hadith 174