حَدَّثَنَا عَمْرُو بْنُ رَافِعٍ، حَدَّثَنَا هُشَيْمٌ، عَنْ أَبِي بَلْجٍ، عَنْ مُحَمَّدِ بْنِ حَاطِبٍ، قَالَ قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏"‏ فَصْلُ مَا بَيْنَ الْحَلاَلِ وَالْحَرَامِ الدُّفُّ وَالصَّوْتُ فِي النِّكَاحِ ‏"‏ ‏.‏

It was narrated from Muhammad bin Hatibthat the Messenger of Allah said: “What differentiates between the lawful and the unlawful is (beating) the Daff and raising the voices (in song) at the time of marriage.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 9 Hadith 1896
Web Ref:  Sunan Ibn Majah Vol 3 Book 9 Hadith 1896