"It is not permissible for a man to give a gift and then take it back except a father taking back what he gave to his son. The likeness of the one who gives a gift then takes it back is that of the dog which eats until it is full, then it vomits, and goes back to its vomit." (Using translation from Nasāʾī 3690)
أَنَّ ابْنَ عُمَرَ وَابْنَ عَبَّاسٍ رَفَعَاهُ إِلَى النَّبِيِّ ﷺ أَنَّهُ قَالَ لَا يَحِلُّ لِلرَّجُلِ أَنْ يُعْطِيَ الْعَطِيَّةَ فَيَرْجِعَ فِيهَا إِلا الْوَالِدَ فِيمَا يُعْطِي وَلَدَهُ وَمَثَلُ الَّذِي يُعْطِي الْعَطِيَّةَ فَيَرْجِعُ فِيهَا كَمَثَلِ الْكَلْبِ أَكَلَ حَتَّى إِذَا شَبِعَ قَاءَ ثُمَّ رَجَعَ فِي قَيْئِهِ