It is narrated from Sayyiduna Habbar bin al-Aswad (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) passed by the house of Habbar bin al-Aswad and heard the sound of singing. He (peace and blessings be upon him) asked: "What is this?" It was said: A wedding. So the Messenger of Allah (peace and blessings be upon him) began to say repeatedly: "This is marriage, not fornication."
Hadith Referenceالمعجم الكبير للطبراني / باب الهاء / 18748