Sahih Muslim , Book 20, Hadith 4630 (USC-MSA) ⓘ

It has been narrated on the authority of Abu Haraira that the Messenger of Allah said: Every wound received by a Muslim in the way of Allah will appear on the Day of Judgment in the same condition as it was when it was inflicted, and would be bleeding profusely. The colour (of its discharge) will be the colour of blood, but its smell will be the smell of musk. By the Being in Whose Hand is Muhammad's life, if it were not hard upon the Muslims, I would not lag behind any expedition undertaken for Jihad, but I do not possess abundant means to provide the Mujahids with riding animals, nor do they (i. e. all of them) have abundant means (to provide themselves with all the means of Jihad) to follow me, nor would it please their hearts to stay behind me.

وَحَدَّثَنَا مُحَمَّدُ بْنُ رَافِعٍ، حَدَّثَنَا عَبْدُ الرَّزَّاقِ، حَدَّثَنَا مَعْمَرٌ، عَنْ هَمَّامِ بْنِ مُنَبِّهٍ، قَالَ هَذَا مَا حَدَّثَنَا أَبُو هُرَيْرَةَ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم فَذَكَرَ أَحَادِيثَ مِنْهَا وَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ كُلُّ كَلْمٍ يُكْلَمُهُ الْمُسْلِمُ فِي سَبِيلِ اللَّهِ ثُمَّ تَكُونُ يَوْمَ الْقِيَامَةِ كَهَيْئَتِهَا إِذَا طُعِنَتْ تَفَجَّرُ دَمًا اللَّوْنُ لَوْنُ دَمٍ وَالْعَرْفُ عَرْفُ الْمِسْكِ ‏"‏ ‏.‏ وَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ وَالَّذِي نَفْسُ مُحَمَّدٍ فِي يَدِهِ لَوْلاَ أَنْ أَشُقَّ عَلَى الْمُؤْمِنِينَ مَا قَعَدْتُ خَلْفَ سَرِيَّةٍ تَغْزُو فِي سَبِيلِ اللَّهِ وَلَكِنْ لاَ أَجِدُ سَعَةً فَأَحْمِلَهُمْ وَلاَ يَجِدُونَ سَعَةً فَيَتَّبِعُونِي وَلاَ تَطِيبُ أَنْفُسُهُمْ أَنْ يَقْعُدُوا بَعْدِي ‏"‏ ‏.‏