Sayyiduna Junayd bin Sab' (may Allah be pleased with him) said: At the beginning of the day I fought against the Messenger of Allah (peace and blessings be upon him) as a disbeliever, and at the end of the day I fought alongside him as a Muslim. And this verse was revealed about us: "And if not for some believing men and believing women" [Surah al-Fath: 25]. He said: We were nine people, seven men and two women.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2191