476.Hadhrat Ibn Mas'ood (Allah be pleased with him) narrates that Muhammad said: "Unite Hajj and Umrah (during Hajj period). Both (acts of Ibaadat) eliminate poverty and sins in a similar way in which the impurities of gold, silver and iron are eliminated. The reward of Hajj which was performed correctly is nothing other that Jannat." (Mishkaat).
(Hayaat-ul-Muslimeen. by Mohammad Ashraf Ali Thanvi).