Sayyiduna Ka'b bin Ujrah (may Allah be pleased with him) narrates: A blind man came to the service of the Prophet (peace and blessings be upon him) and said: "O Messenger of Allah! I hear the call to prayer, but sometimes there is no one to bring me along." So the Prophet (peace and blessings be upon him) said: "When you hear the call to prayer, then respond to the call of the one who invites to Allah (i.e., come to the mosque to perform the prayer in congregation)."

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates: The Noble Prophet (peace and blessings be upon him) said: "Appoint your best people as your imam, for they are representatives between you and your Lord."