(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).'" (TH)
Reference (TH): Sunan an-Nasa'i 3370 (TH)
In-book reference (TH): Book 26, Hadith 175 (TH)
English translation (TH): Vol. 4, Book 26, Hadith 3372 (TH)