"The Messenger of Allah said: 'The likeness of the one who takes back his gift, is that of a dog which goes back to its vomit and eats it.'" (Using translation from Nasāʾī 3693)
قَالَ رَسُولُ اللهِ ﷺ «مَثَلُ الَّذِي يَرْجِعُ فِي صَدَقَتِهِ كَمَثَلِ الْكَلْبِ يَرْجِعُ فِي قَيْئِهِ فَيَأْكُلُهُ»