It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Perform Hajj and Umrah consecutively, for indeed they remove poverty and sins just as a furnace removes impurities from iron, gold, and silver. And the reward for an accepted Hajj is nothing except Paradise."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 3669
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناده حسن.