Sahih al-Bukhari 2970

Arabic

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 ‏"‏‏.‏

English translation

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 2970, Book of Fighting for the Cause of Allah (Jihaad). English translation by Dr. Muhammad Muhsin Khan.