Musannaf Ibn Abi Shaybah 6247 — A slave leading the prayer

Dawud bin al-Husayn said: Abu Sufyan was a mukatab slave (one buying his freedom by contract) and he used to lead Banu Abd al-Ashhal in prayer. Among them were some of the Companions, such as Sayyiduna Muhammad bin Maslamah and Sayyiduna Salamah bin Salamah (may Allah be pleased with them). Once the people wanted to remove him from leading the prayer, but when those two heard his recitation, they said: "Should someone like him be removed from leading the prayer?"