It is narrated from Sayyiduna Jabir bin Samurah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) entered the mosque and the people were sitting in different circles. He (peace and blessings be upon him) said: What is the reason that I see you in groups? Then he (peace and blessings be upon him) entered the mosque and saw that the people had raised their hands (in prayer) like the tails of unruly horses. He (peace and blessings be upon him) said: Observe calmness in prayer.