حَدَّثَنَا ابْنُ أَبِي عُمَرَ، وَعَبْدُ بْنُ حُمَيْدٍ، - وَاللَّفْظُ لِعَبْدٍ - قَالَ أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، عَنْ سَالِمٍ، عَنِ ابْنِ عُمَرَ، أَنَّ عُمَرَ، حَمَلَ عَلَى فَرَسٍ فِي سَبِيلِ اللَّهِ ثُمَّ رَآهَا تُبَاعُ فَأَرَادَ أَنْ يَشْتَرِيَهَا فَسَأَلَ النَّبِيَّ صلى الله عليه وسلم فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ تَعُدْ فِي صَدَقَتِكَ يَا عُمَرُ " .
Salim reported from Ibn Umar (Allah be pleased with them) that 'Umar donated a horse in the path of Allah and then found it being sold, and he decided to buy that. He asked Allah's Apostle (PBUH) about it, whereupon Allah's Messenger (PBUH) said: Umar, do not get back what you gave as charity. Translation Not Available
Book Ref: Sahih Muslim Book 24 Hadith 3954
Web Ref: Sahih Muslim Book 12 Hadith 1621 c