ʿUmar gave a horse to be used in Allah's Cause, but later on he found it being sold. So, he intended to buy it and asked Messenger of Allah ﷺ who said, "Don't buy it and don't take back your gift of charity."  

أَنْ يَبْتَاعَهُ فَسَأَلَ رَسُولَ اللَّهِ ﷺ فَقَالَ لاَ تَبْتَعْهُ وَلاَ تَعُدْ فِي صَدَقَتِكَ  

ʿUmar bin Al-Khattab gave a horse to be ridden in Allah's Cause and then he found it being sold. He intended to purchase it. So, he consulted Messenger of Allah ﷺ who said, "Don't buy it and don't take back your gift of charity."  

أَنْ يَبْتَاعَهُ فَسَأَلَ رَسُولَ اللَّهِ ﷺ فَقَالَ لاَ تَبْتَعْهُ وَلاَ تَعُدْ فِي صَدَقَتِكَ  

‘Umar bin Al Khattab gave a horse as alms in the way of Allah. He then found it being sold, and intended to buy it. So he asked the Messenger of Allah ﷺ about this. He said Do not buy it, and do not take back your sadaqah.  

أَنْ يَبْتَاعَهُ فَسَأَلَ رَسُولَ اللَّهِ ﷺ عَنْ ذَلِكَ فَقَالَ لاَ تَبْتَعْهُ وَلاَ تَعُدْ فِي صَدَقَتِكَ  

Yahya related to me from Malik from Nafi from Abdullah ibn Umar that Umar ibn al-Khattab gave a horse to carry some one in the way of Allah, and then he wished to buy it back. So he asked the Messenger of Allah ﷺ about it, and he said, "Do not buy or take back your sadaqa."  

أَنَّ عُمَرَ بْنَ الْخَطَّابِ حَمَلَ عَلَى فَرَسٍ فِي سَبِيلِ اللَّهِ فَأَرَادَ أَنْ يَبْتَاعَهُ فَسَأَلَ عَنْ ذَلِكَ رَسُولَ اللَّهِ ﷺ فَقَالَ لاَ تَبْتَعْهُ وَلاَ تَعُدْ فِي صَدَقَتِكَ  

‘Umar bin Al Khattab gave a horse as alms in the way of Allah. He then found it being sold, and intended to buy it. So he asked the Messenger of Allah ﷺ about this. He said Do not buy it, and do not take back your sadaqah. (Using translation from Abū Dāʾūd 1593)  

أَنْ يَبْتَاعَهُ فَسَأَلَ رَسُولَ اللَّهِ ﷺ عَنْ ذَلِكَ فَقَالَ «لَا تَبْتَعْهُ وَلَا تَعُدْ فِي صَدَقَتِكَ»