It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that the Prophet of Allah (peace and blessings be upon him) was asked; it was said: "O Messenger of Allah, will the people of Paradise sleep?"
So the Messenger of Allah (peace and blessings be upon him) said: "Sleep is the brother of death, and the people of Paradise will not sleep."
Hadith Referenceالمعجم الأوسط / باب الألف / 919
Hadith Takhrij«أخرجه الطبراني فى «الأوسط» برقم: 8816»