Sayyiduna Umar (may Allah be pleased with him) once sought permission from the Prophet (peace and blessings be upon him) to go for Umrah. The Prophet (peace and blessings be upon him) granted him permission and said, "Brother! Do not forget us in your prayers," or he said, "Brother! Remember us also in your 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.