Messenger of Allah ﷺ said, "None is wounded in Allah's Cause but will come on the Day of Resurrection with his wound bleeding. The thing that will come out of his wound will be the color of blood, but its smell will be the smell of musk."  

قَالَ رَسُولُ اللَّهِ ﷺ مَا مِنْ مَكْلُومٍ يُكْلَمُ فِي اللَّهِ إِلاَّ جَاءَ يَوْمَ الْقِيَامَةِ وَكَلْمُهُ يَدْمَى اللَّوْنُ لَوْنُ دَمٍ وَالرِّيحُ رِيحُ مِسْكٍ  

The Prophet ﷺ said, 'The example of a good pious companion and an evil one is that of a person carrying musk and another blowing a pair of bellows. The one who is carrying musk will either give you some perfume as a present, or you will buy some from him, or you will get a good smell from him, but the one who is blowing a pair of bellows will either burn your clothes or you will get a bad smell from him."  

عَنِ النَّبِيِّ ﷺ قَالَ مَثَلُ الْجَلِيسِ الصَّالِحِ وَالسَّوْءِ كَحَامِلِ الْمِسْكِ وَنَافِخِ الْكِيرِ فَحَامِلُ الْمِسْكِ إِمَّا أَنْ يُحْذِيَكَ وَإِمَّا أَنْ تَبْتَاعَ مِنْهُ وَإِمَّا أَنْ تَجِدَ مِنْهُ رِيحًا طَيِّبَةً وَنَافِخُ الْكِيرِ إِمَّا أَنْ يُحْرِقَ ثِيَابَكَ وَإِمَّا أَنْ تَجِدَ رِيحًا خَبِيثَةً