(72) باب إِعْلاَنِ النِّكَاحِ بِالصَّوْتِ وَضَرْبِ الدُّفِّ .
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.'" (FR)
Reference (FR): Sunan an-Nasa'i 3369 (FR)
In-book reference (FR): Book 26, Hadith 174 (FR)
English translation (FR): Vol. 4, Book 26, Hadith 3371 (FR)