It is narrated from Hazrat Anas (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: Once I entered Paradise and there I saw a palace made of gold. I asked, "Whose palace is this?" People replied, "It belongs to a young man from the Quraysh." I asked, "Who is he?" People replied, "Umar bin Khattab (may Allah be pleased with him)." The Prophet (peace and blessings be upon him) said: If I had not known about your sense of honor (ghayrah), I would certainly have entered it. Hazrat Umar (may Allah be pleased with him) said, "O Messenger of Allah (peace and blessings be upon him)! I may express my sense of honor before anyone, but I cannot do so before you."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 12983