Sunan Ibn Majah Book 37, Hadith 4331

حَدَّثَنَا سُوَيْدُ بْنُ سَعِيدٍ، حَدَّثَنَا حَفْصُ بْنُ مَيْسَرَةَ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ عَطَاءِ بْنِ يَسَارٍ، أَنَّ مُعَاذَ بْنَ جَبَلٍ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ ‏ "‏ الْجَنَّةُ مِائَةُ دَرَجَةٍ كُلُّ دَرَجَةٍ مِنْهَا مَا بَيْنَ السَّمَاءِ وَالأَرْضِ وَإِنَّ أَعْلاَهَا الْفِرْدَوْسُ وَإِنَّ أَوْسَطَهَا الْفِرْدَوْسُ وَإِنَّ الْعَرْشَ عَلَى الْفِرْدَوْسِ مِنْهَا تُفَجَّرُ أَنْهَارُ الْجَنَّةِ فَإِذَا مَا سَأَلْتُمُ اللَّهَ فَسَلُوهُ الْفِرْدَوْسَ ‏"‏ ‏.‏

Mu’adh bin Jabal said:“I heard the Messenger of Allah (ﷺ) say: ‘Paradise has one hundred grades, each of which is as big as the distance between heaven and earth. The highest of them is Firdaws and the best of them is Firdaws. The Throne is above Firdaws and from it spring forth the rivers of Paradise. If you ask of Allah, ask Him for Firdaws.’”