Musannaf Ibn Abi Shaybah 31916 — Reports on reciting the Quran

Sulayman bin Yasar said that Sayyiduna Umar (may Allah be pleased with him) came to some people who were teaching one another the Qur'an. When they saw Sayyiduna Umar, they fell silent. Sayyiduna Umar said: "What were you going over?" We said: "Some of us were teaching the Qur'an to others." He said: "Recite, and do not make mistakes."