عَنْ زَيْدِ بْنِ أَسْلَمَ عَنْ أَبِيهِ أَنَّ عُمَرَ رَضِيَ اللَّهُ عَنْهُ حَمَلَ عَلَى فَرَسٍ فِي سَبِيلِ اللَّهِ عَزَّ وَجَلَّ فَرَآهَا أَوْ بَعْضَ نِتَاجِهَا يُبَاعُ فَأَرَادَ شِرَاءَهُ فَسَأَلَ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالَ: ((أَتْرُكْهَا تُوَافِكَ أَوْ تَلْقَاهَا جَمِيعًا))، وَقَالَ مَرَّةً: فَنَهَاهُ وَقَالَ: ((لَا تَشْتَرِهِ وَلَا تَعُدْ فِي صَدَقَتِكَ))
Sayyiduna Umar (may Allah be pleased with him) gave a horse in charity in the way of Allah. Then when he saw that it or its offspring was being sold, he intended to buy it back and asked the Noble Prophet (peace and blessings be upon him) about it. The Prophet (peace and blessings be upon him) said: Do not buy it now, so that (on the Day of Resurrection) you may receive it in full (or the narrator said) you may receive its full reward. On one occasion, the narrator said: The Prophet (peace and blessings be upon him) forbade him and said: Do not buy it and do not take back what you have given in charity.