Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you becomes drowsy in his place on the day of Jumu'ah, he should change his place." This is the narration of Ashajj. And in the narration of Yazid bin Harun, the words are: "I heard the Messenger of Allah (peace and blessings be upon him)."