Sunan Ibn Majah, Chapter: The Book of the Sunnah

"We were sitting with the Prophet (saw) and he said: 'While I was sleeping I saw myself in Paradise (in a dream), and I saw a woman performing ablution beside a palace. I asked: 'Whose palace is this?" She said: "Umar's." I remembered his protective jealousy, so I turned away and left.'" Abu Hurairah said: "Umar wept and said: 'May my father and mother be sacrificed for you, O Messenger of Allah! Would I feel any protective jealousy against you?'" (Sahih)