The Messenger of Allah said: "Publicize this marriage, and hold it in the Masjid, and beat the Duff for it."
Jami` at-Tirmidhi Book 11, Hadith 10
← Previous Hadith The Messenger of Allah said: "The distinction between the lawful and the unlawful is the Duff and the voice."

Jami` at-Tirmidhi Book 11, Hadith 9 Next Hadith → "The morning after the consummation of my marriage, the Prophet came and sat on my bed as far from me as you are sitting now, and our little girls started beating the Duff and reciting verses mourning my father who had been killed in the battle of Badr. One of them said: 'Among us is a Prophet who knows what will happen tomorrow.' On that the Prophet said: 'Stop saying this, and keep on saying what you were saying before.'"

Jami` at-Tirmidhi Book 11, Hadith 11