Musannaf Ibn Abi Shaybah 27402 — Reports on spreading the greeting

It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Indeed, in Paradise there are upper chambers whose exterior can be seen from their interior, and whose interior can be seen from their exterior." At this a Bedouin stood up and said: "O Messenger of Allah (peace and blessings be upon him)! For whom will these chambers be?" He (peace and blessings be upon him) said: "They will be for the one who speaks pure words, feeds others, spreads the greeting of peace, and prays at night while people are asleep."