Musannaf Ibn Abi Shaybah 32703 — Reports on talk about rulers

Mujahid (may Allah have mercy on him) said: We used to take pride over people through four men: through our jurist, through our preacher, and through our mu'adhdhin and our reciter. Our jurist was Sayyiduna Ibn Abbas (may Allah be pleased with them both), our mu'adhdhin was Sayyiduna Abu Mahdhurah (may Allah be pleased with him), our preacher was Ubayd bin Umayr, and our reciter was Sayyiduna Abdullah bin al-Sa'ib (may Allah be pleased with him).