Sunnah.com reference : Book 7, Hadith 187English translation : Book 7, Hadith 0Arabic reference : Book 7, Hadith 929
A narration by al-Bukhari has:
"An evil example does not apply to us, one who repossesses a gift is like a dog which vomits and then returns to its vomit."
وَفِي رِوَايَةٍ لِلْبُخَارِيِّ : { لَيْسَ لَنَا مَثَلُ اَلسَّوْءِ, اَلَّذِي يَعُودُ فِي هِبَتِهِ كَالْكَلْبِ يَرْجِعُ فِي قَيْئِهِ }   1‏ .‏‏1 ‏- البخاري برقم ( 2622 )‏.‏