Fighting for the Cause of Allah (Jihaad)
56/119. Chapter:
The wages given to fight on somebody else's behalf
Sahih Bukhari
حَدَّثَنَا الْحُمَيْدِيُّ، حَدَّثَنَا سُفْيَانُ، قَالَ سَمِعْتُ مَالِكَ بْنَ أَنَسٍ، سَأَلَ زَيْدَ بْنَ أَسْلَمَ، فَقَالَ زَيْدٌ سَمِعْتُ أَبِي يَقُولُ، قَالَ عُمَرُ بْنُ الْخَطَّابِ ـ رضى الله عنه ـ حَمَلْتُ عَلَى فَرَسٍ فِي سَبِيلِ اللَّهِ، فَرَأَيْتُهُ يُبَاعُ، فَسَأَلْتُ النَّبِيَّ صلى الله عليه وسلم آشْتَرِيهِ فَقَالَ " لاَ تَشْتَرِهِ، وَلاَ تَعُدْ فِي صَدَقَتِكَ ".
Narrated `Umar bin Al-Khattab: I gave a horse to be used in Allah's Cause, but later on I saw it being sold. I asked the Prophet (ﷺ) whether I could buy it. He said, "Don't buy it and don't take back your gift of charity."
Reference : Sahih al-Bukhari 2970In-book reference : Book 56, Hadith 179USC-MSA web (English) reference : Vol. 4, Book 52, Hadith 214