Sahih al-Bukhari, Volume 4, Book 52, Hadith 48 (USC-MSA) ⓘ

Narrated Abu Huraira: The Prophet said, "Whoever believes in Allah and His Apostle, offer prayer perfectly and fasts the month of Ramadan, will rightfully be granted Paradise by Allah, no matter whether he fights in Allah's Cause or remains in the land where he is born." The people said, "O Allah's Messenger ! Shall we acquaint the people with the is good news?" He said, "Paradise has one-hundred grades which Allah has reserved for the Mujahidin who fight in His Cause, and the distance between each of two grades is like the distance between the Heaven and the Earth. So, when you ask Allah (for something), ask for Al-firdaus which is the best and highest part of Paradise." (i.e. The sub-narrator added, "I think the Prophet also said, 'Above it (i.e. Al-Firdaus) is the Throne of Beneficent (i.e. Allah), and from it originate the rivers of Paradise.")

حَدَّثَنَا يَحْيَى بْنُ صَالِحٍ، حَدَّثَنَا فُلَيْحٌ، عَنْ هِلاَلِ بْنِ عَلِيٍّ، عَنْ عَطَاءِ بْنِ يَسَارٍ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ مَنْ آمَنَ بِاللَّهِ وَبِرَسُولِهِ وَأَقَامَ الصَّلاَةَ وَصَامَ رَمَضَانَ، كَانَ حَقًّا عَلَى اللَّهِ أَنْ يُدْخِلَهُ الْجَنَّةَ جَاهَدَ فِي سَبِيلِ اللَّهِ، أَوْ جَلَسَ فِي أَرْضِهِ الَّتِي وُلِدَ فِيهَا ‏"‏‏.‏ فَقَالُوا يَا رَسُولَ اللَّهِ أَفَلاَ نُبَشِّرُ النَّاسَ‏.‏ قَالَ ‏"‏ إِنَّ فِي الْجَنَّةِ مِائَةَ دَرَجَةٍ أَعَدَّهَا اللَّهُ لِلْمُجَاهِدِينَ فِي سَبِيلِ اللَّهِ، مَا بَيْنَ الدَّرَجَتَيْنِ كَمَا بَيْنَ السَّمَاءِ وَالأَرْضِ، فَإِذَا سَأَلْتُمُ اللَّهَ فَاسْأَلُوهُ الْفِرْدَوْسَ، فَإِنَّهُ أَوْسَطُ الْجَنَّةِ وَأَعْلَى الْجَنَّةِ، أُرَاهُ فَوْقَهُ عَرْشُ الرَّحْمَنِ، وَمِنْهُ تَفَجَّرُ أَنْهَارُ الْجَنَّةِ ‏"‏‏.‏ قَالَ مُحَمَّدُ بْنُ فُلَيْحٍ عَنْ أَبِيهِ ‏"‏ وَفَوْقَهُ عَرْشُ الرَّحْمَنِ ‏"‏‏.‏