The Book of Paradise, its Description, its Bounties and its Inhabitants
حَدَّثَنَا أَبُو كُرَيْبٍ، وَأَحْمَدُ بْنُ عُمَرَ الْوَكِيعِيُّ، قَالاَ حَدَّثَنَا ابْنُ فُضَيْلٍ، عَنْ أَبِيهِ، عَنْ أَبِي حَازِمٍ، عَنْ أَبِي هُرَيْرَةَ، يَرْفَعُهُ قَالَ " مَا بَيْنَ مَنْكِبَىِ الْكَافِرِ فِي النَّارِ مَسِيرَةُ ثَلاَثَةِ أَيَّامٍ لِلرَّاكِبِ الْمُسْرِعِ " . وَلَمْ يَذْكُرِ الْوَكِيعِيُّ " فِي النَّارِ " .Abu Huraira reported directly from Allah's Messenger (ﷺ) that he said:The distance of the two shoulders of the non-believer in Hell will be a three-day journey for a swift rider
From Sahih Muslim, whose reports the scholars accept as authentic.