Musannaf Ibn Abi Shayba 27:354

Ali ibn Mushir narrated to us, from Muhammad ibn Amr, from Abu Salamah, from Abu Hurairah, from the Prophet (peace be upon him), who said: "I entered Paradise, and behold, there was a palace of gold in it. Its beauty amazed me, so I asked, 'For whom is this?' It was said to me, 'For Umar.' Nothing prevented me from entering it except what I know of your protective jealousy, O Abu Hafs." Umar wept and said, "O Messenger of Allah, would I be jealous of you?"