Abu Huraira reported: The Messenger of Allah, peace be upon him, said, “Whoever believes in Allah and His Messenger, establishes prayer, and fasts the month of Ramadan will have a right upon Allah that he will be entered into Paradise whether he strives in the cause of Allah or remains in the land in which he was born.” They said, “O Messenger of Allah, shall we not give the glad tidings to the people?” He said, “Verily, in Paradise are one hundred grades which Allah has reserved for those who strive in His cause; the distance between two grades is like the distance between the heaven and the earth. So when you ask Allah, then ask for Al-Firdaws, for indeed, it is the highest part of Paradise; above it is the Throne of the Merciful and flowing rivers.”
[Sahih Bukhari, Book 52, Number 48]
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ
مَنْ آمَنَ بِاللَّهِ وَبِرَسُولِهِ وَأَقَامَ الصَّلَاةَ وَصَامَ
رَمَضَانَ كَانَ حَقًّا عَلَى اللَّهِ أَنْ يُدْخِلَهُ الْجَنَّةَ جَاهَدَ
فِي سَبِيلِ اللَّهِ أَوْ جَلَسَ فِي أَرْضِهِ الَّتِي وُلِدَ فِيهَا فَقَالُوا يَا رَسُولَ اللَّهِ أَفَلَا نُبَشِّرُ النَّاسَ قَالَ إِنَّ
فِي الْجَنَّةِ مِائَةَ دَرَجَةٍ أَعَدَّهَا اللَّهُ لِلْمُجَاهِدِينَ فِي
سَبِيلِ اللَّهِ مَا بَيْنَ الدَّرَجَتَيْنِ كَمَا بَيْنَ السَّمَاءِ
وَالْأَرْضِ فَإِذَا سَأَلْتُمُ اللَّهَ فَاسْأَلُوهُ الْفِرْدَوْسَ
فَإِنَّهُ أَوْسَطُ الْجَنَّةِ وَأَعْلَى الْجَنَّةِ أُرَاهُ فَوْقَهُ
عَرْشُ الرَّحْمَنِ وَمِنْهُ تَفَجَّرُ أَنْهَارُ الْجَنَّةِ
صحيح البخاري كِتَاب الْجِهَادِ وَالسِّيَرِ بَاب دَرَجَاتِ الْمُجَاهِدِينَ فِي سَبِيلِ اللَّهِ