" الْحَجَّةُ الْمَبْرُورَةُ لَيْسَ لَهَا جَزَاءٌ إِلاَّ الْجَنَّةُ وَالْعُمْرَةُ إِلَى الْعُمْرَةِ كَفَّارَةٌ لِمَا بَيْنَهُمَا "
It was narrated that Abu Hurairah said: "The Messenger of Allah said: 'Hajj al-Mabrur brings no reward other than Paradise, and from one 'Umrah to another is expiation for what came in between." (Shih)