Musannaf Ibn Abi Shaybah

Hazrat Muawiyah bin Qurrah says that I met thirty men from the tribe of Muzaynah; each of them had either thrown a spear or received spear wounds, and each had either wielded a sword or received sword wounds. All of them would perform ghusl on Friday, wear their best clothes, apply perfume, and go for Jumu'ah. They would offer the two rak'ahs of Jumu'ah and then sit and teach knowledge.