(72) باب إِعْلاَنِ النِّكَاحِ بِالصَّوْتِ وَضَرْبِ الدُّفِّ .
It was narrated that Abu Balj said:
"I heard Muhammad bin Hatib say: 'What differentiates between the lawful and the unlawful is the voice (singing).'" (JA)
Reference (JA): Sunan an-Nasa'i 3370 (JA)
In-book reference (JA): Book 26, Hadith 175 (JA)
English translation (JA): Vol. 4, Book 26, Hadith 3372 (JA)