Abu Ma'mar narrates: We asked Sayyiduna Khabbab (may Allah be pleased with him): Did the Prophet (peace and blessings of Allah be upon him) recite (Qur'an) in the Zuhr and Asr prayers? He replied: Yes. We asked: How did you come to know this? He replied: Because of the movement of the Prophet's (peace and blessings of Allah be upon him) beard.