Abu Saʿid, whoever cheerfully accepts Allah as his Lord, Islam as his religion and Muhammad as his Apostle is necessarily entitled to enter Paradise. He (Abu Saʿid) wondered at it and said: Messenger of Allah, repeat it for me. He (the Messenger of Allah) did that and said: There is another act which elevates the position of a man in Paradise to a grade one hundred (higher), and the elevation between one grade and the other is equal to the height of the heaven from the earth. He (Abu Saʿid) said: What is that act? He replied: Jihad in the way of Allah! Jihad in the way of Allah! (Using translation from Muslim 1884)  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «يَا أَبَا سَعِيدٍ مَنْ رَضِيَ بِاللهِ رَبًّا وَبِالْإِسْلَامِ دِينًا وَبِمُحَمَّدٍ ﷺ نَبِيًّا وَجَبَتْ لَهُ الْجَنَّةُ» قَالَ فَعَجِبَ لَهَا أَبُو سَعِيدٍ قَالَ أَعِدْهَا عَلَيَّ يَا رَسُولَ اللهِ فَفَعَلَ ثُمَّ قَالَ رَسُولُ اللهِ ﷺ «وَأُخْرَى يُرْفَعُ بِهَا لِلْعَبْدِ مِائَةُ دَرَجَةٍ فِي الْجَنَّةِ مَا بَيْنَ كُلِّ دَرَجَتَيْنِ كَمَا بَيْنَ السَّمَاءِ وَالْأَرْضِ» قَالَ وَمَا هِيَ يَا رَسُولَ اللهِ؟ قَالَ «الْجِهَادُ فِي سَبِيلِ اللهِ الْجِهَادُ فِي سَبِيلِ اللهِ الْجِهَادُ فِي سَبِيلِ اللهِ»  

"The Messenger of Allah ﷺ said: 'Whoever established Salah, pays Zakah, and dies not associating anything with Allah, he has a right from Allah the Mighty and Sublime, that He will forgive him, whether he emigrated, or died in his birthplace.' We said: 'O Messenger of Allah! Shall we not tell the people about it so that they may rejoice?' He said: 'In Paradise there are one hundred levels, (the distance) between each two of which is like (the distance) between the Heaven and the Earth; Allah has prepared them fro the Mujahidin who strive in His cause. Were it not that it would be too difficult for the believers and I cannot find mounts for them - and they do not like to stay behind if I go out (on a campaign) - I would not have stayed behind from any expedition. I wish that I could be killed then brought back to life, then killed again.'" (Using translation from Nasāʾī 3132)  

قَالَ رَسُولُ اللهِ ﷺ «مَنْ أَقَامَ الصَّلَاةَ وَآتَى الزَّكَاةَ وَمَاتَ لَا يُشْرِكُ بِاللهِ شَيْئًا كَانَ حَقًّا عَلَى اللهِ أَنْ يَغْفِرَ لَهُ هَاجَرَ أَوْ مَاتَ فِي مَوْلِدِهِ» فَقُلْنَا يَا رَسُولَ اللهِ أَلَا تُخْبِرُ بِهَا النَّاسَ فَلْيُبَشَّرُوا بِهَا؟ فَقَالَ «إِنَّ الْجَنَّةَ مِائَةُ دَرَجَةٍ مَا بَيْنَ كُلِّ دَرَجَتَيْنِ كَمَا بَيْنَ السَّمَاءِ وَالْأَرْضِ أَعَدَّهَا لِلْمُجَاهِدِينَ فِي سَبِيلِهِ وَلَوْلَا أَنْ أَشُقَّ عَلَى الْمُؤْمِنِينَ وَلَا أَجِدُ مَا أَحْمِلُهُمْ عَلَيْهِ وَلَا تَطِيبُ أَنْفُسُهُمْ أَنْ يَتَخَلَّفُوا بَعْدِي مَا قَعَدْتُ خَلْفَ سَرِيَّةٍ وَلَوَدِدْتُ أَنِّي أُقْتَلُ ثُمَّ أُحْيَا ثُمَّ أُقْتَلُ»