حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا مُحَمَّدُ بْنُ فُضَيْلٍ، عَنْ عُمَارَةَ بْنِ الْقَعْقَاعِ، عَنْ أَبِي زُرْعَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ أَعَدَّ اللَّهُ لِمَنْ خَرَجَ فِي سَبِيلِهِ لاَ يُخْرِجُهُ إِلاَّ جِهَادٌ فِي سَبِيلِي وَإِيمَانٌ بِي وَتَصْدِيقٌ بِرُسُلِي فَهُوَ عَلَىَّ ضَامِنٌ أَنْ أُدْخِلَهُ الْجَنَّةَ أَوْ أَرْجِعَهُ إِلَى مَسْكَنِهِ الَّذِي خَرَجَ مِنْهُ نَائِلاً مَا نَالَ مِنْ أَجْرٍ أَوْ غَنِيمَةٍ ‏"‏ ‏.‏ ثُمَّ قَالَ ‏"‏ وَالَّذِي نَفْسِي بِيَدِهِ لَوْلاَ أَنْ أَشُقَّ عَلَى الْمُسْلِمِينَ مَا قَعَدْتُ خِلاَفَ سَرِيَّةٍ تَخْرُجُ فِي سَبِيلِ اللَّهِ أَبَدًا وَلَكِنْ لاَ أَجِدُ سَعَةً فَأَحْمِلَهُمْ وَلاَ يَجِدُونَ سَعَةً فَيَتَّبِعُونِي وَلاَ تَطِيبُ أَنْفُسُهُمْ فَيَتَخَلَّفُونَ بَعْدِي وَالَّذِي نَفْسُ مُحَمَّدٍ بِيَدِهِ لَوَدِدْتُ أَنْ أَغْزُوَ فِي سَبِيلِ اللَّهِ فَأُقْتَلَ ثُمَّ أَغْزُوَ فَأُقْتَلَ ثُمَّ أَغْزُوَ فَأُقْتَلَ ‏"‏ ‏.‏

It wasnarrated from Abu Hurairah that the Messenger of Allah (PBUH)said: “Allah has prepared (reward) for those who go out (to fight) inHiscause: ‘And do not go out except (to fight) for Jihad in My cause,out of faith in Me and belief in My Messengers, but he has aguaranteefrom Me that I will admit him to Paradise, or I will returnhim to hisdwelling from which he set out, with the reward that heattained, orthe spoils that he acquired.’ Then he said: ‘By theOne in Whose Handis my soul, were it not that it would be toodifficult for theMuslims, I would never have stayed behind from anyexpedition thatwent out in the cause of Allah. But I could not findthe resources togive them mounts and they could not find theresources to follow me,nor would they be pleased to stay behind if Iwent. By the One inWhose Hand is the soul of Muhammad, I wish Icould fight in the causeof Allah and be killed, then fight and bekilled, then fight and bekilled.’” Translation Not Available

Book Ref: Sunan Ibn Majah Book 24 Hadith 2753
Web Ref:  Sunan Ibn Majah Vol 4 Book 24 Hadith 2753