The Book of Paradise, its Description, its Bounties and its Inhabitants
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ بْنِ قَعْنَبٍ، حَدَّثَنَا حَمَّادُ بْنُ سَلَمَةَ، عَنْ ثَابِتٍ، وَحُمَيْدٍ، عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " حُفَّتِ الْجَنَّةُ بِالْمَكَارِهِ وَحُفَّتِ النَّارُ بِالشَّهَوَاتِ " .Anas b. Malik reported:The Paradise is surrounded by hardships and the Hell-Fire is surrounded by temptations
From Sahih Muslim, whose reports the scholars accept as authentic.