Sunan an-Nasa'i, Hadith 2623 ⓘ
It was narrated from Abu Hurairah that the Prophet said: "Hajj Al-Mabrur brings no reward other than paradise," the report is the same except that he said, "expiates for what came in between."
أَخْبَرَنَا عَمْرُو بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا حَجَّاجٌ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي سُهَيْلٌ، عَنْ سُمَىٍّ، عَنْ أَبِي صَالِحٍ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " الْحَجَّةُ الْمَبْرُورَةُ لَيْسَ لَهَا ثَوَابٌ إِلاَّ الْجَنَّةُ " . مِثْلَهُ سَوَاءً إِلاَّ أَنَّهُ قَالَ " تُكَفِّرُ مَا بَيْنَهُمَا " .
also referenced under: Book 24, Hadith 0 (In-Book) & Volume 3, Book 24, Hadith 2624 (DarusSalam)