The Book of Gifts
24/1. Chapter:
It Is Disliked For A Man To Buy What He Gave In Charity From The One To Whom He Gave It
Sahih Muslim
وَحَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ، - يَعْنِي ابْنَ مَهْدِيٍّ - عَنْ مَالِكِ، بْنِ أَنَسٍ بِهَذَا الإِسْنَادِ وَزَادَ " لاَ تَبْتَعْهُ وَإِنْ أَعْطَاكَهُ بِدِرْهَمٍ " .
This hadith has been narrated on the authority of Malik b. Anas with the same chain of transmitters but with this addition: " Don't buy that even if he gives you for one dirham."
Reference : Sahih Muslim 1620bIn-book reference : Book 24, Hadith 2USC-MSA web (English) reference : Book 12, Hadith 3949