The Book Pertaining to the Merits of the Companions (Allah Be Pleased With Them) of the Holy Prophet (May Peace Be Upon Him) (Kitab Al-Fada'il Al-Sahabah)
Muslim :: Book 31 : Hadith 5896
Jabir reported Allah's Messenger (may peace be upon him) as saying: I entered Paradise and saw in it a house or a palace. I said: For whom is it resersred? They (the Angels) said: It is for 'Umar b. Khattab. (The Holy Prophet said to 'Umar b. Khattab): I intenied to get into it but I thought of your feelings. Thereupon 'Umar wept and said: Apostle of Allah, could I feel any jealousy in your case?