It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that Sayyiduna Umar Farooq (may Allah be pleased with him) once sought permission from the Prophet (peace and blessings be upon him) to perform Umrah. The Prophet (peace and blessings be upon him) granted him permission and said: "Brother! Do not forget to remember us in your righteous prayers." Sayyiduna Umar (may Allah be pleased with him) says that if, in exchange for this one word «يا اخي», I were given everything upon which the sun rises, that is, the whole world, I would not prefer the whole world over this one word.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5229
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف عاصم بن عبيدالله .