[Machine] That Umar gave a horse in the cause of Allah as charity, but then he found it being sold. So, he wanted to buy it back. He then went to the Messenger of Allah ﷺ and sought his guidance in this matter. The Messenger of Allah ﷺ told him not to count it as part of his charity. From that point on, Ibn Umar used to refrain from buying anything that he had given as charity or used for a good cause, except that he would consider it as an act of charity.  

أَنَّ عُمَرَ تَصَدَّقَ بِفَرَسٍ فِي سَبِيلِ اللهِ فَوَجَدَهُ يُبَاعُ بَعْدَ ذَلِكَ فَأَرَادَ أَنْ يَشْتَرِيَهُ ثُمَّ أَتَى رَسُولَ اللهِ ﷺ فَاسْتَأْمَرَهُ فِي ذَلِكَ فَقَالَ لَهُ رَسُولُ اللهِ ﷺ لَا تَعُدْ فِي صَدَقَتِكَ فَبِذَلِكَ كَانَ ابْنُ عُمَرَ يَتْرُكُ أَنْ يَبْتَاعَ شَيْئًا تَصَدَّقَ بِهِ أَوْ بَرَّ بِهِ إِلَّا جَعَلَهُ صَدَقَةً