Sayyiduna Bara bin Azib (may Allah be pleased with him) narrates that a man recited Surah Al-Kahf. In the house where he was reciting, his mount was also tied. The mount began to get restless. He saw that a cloud was overshadowing him. When this was mentioned to the Noble Prophet (peace and blessings be upon him), he said: "O so-and-so! If you had continued reciting, it was tranquility (sakinah) which was descending for the Qur'an."