Sunan Ibn Majah, Volume 4, Book 25, Hadith 2888 (DarusSalam) ⓘ
It was narrated from Abu Hurairah that the Prophet said: “From one ‘Umrah to another is an expiation for the sins that came in between them, and Hajj Mabrur (an accepted Hajj) brings no less a reward than Paradise.”
حَدَّثَنَا أَبُو مُصْعَبٍ، حَدَّثَنَا مَالِكُ بْنُ أَنَسٍ، عَنْ سُمَىٍّ، - مَوْلَى أَبِي بَكْرِ بْنِ عَبْدِ الرَّحْمَنِ - عَنْ أَبِي صَالِحٍ السَّمَّانِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ قَالَ " الْعُمْرَةُ إِلَى الْعُمْرَةِ كَفَّارَةُ مَا بَيْنَهُمَا وَالْحَجُّ الْمَبْرُورُ لَيْسَ لَهُ جَزَاءٌ إِلاَّ الْجَنَّةُ " .
also referenced under: Hadith 2888 (Reference) & Book 25, Hadith 3000 (In-Book)