Musnad Ahmad

Amr bin Mirdas says that once I came to Syria and there I saw a man whose lips were very thick and there were weapons in front of him. People were asking him questions and he was saying, "O people! Take these weapons and use them for reform, and strive in the way of Allah with them. This is what the Prophet Muhammad (peace be upon him) has said." I asked the people, "Who is this?" They told me, "This is Hazrat Bilal (may Allah be pleased with him)."