The Prophet ﷺ as saying: One who seeks to take back a gift like the one who returns to it vomit. Hammam said: "And Qatadah said: We regard vomiting as unlawful."  

عَنِ النَّبِيِّ ﷺ قَالَ الْعَائِدُ فِي هِبَتِهِ كَالْعَائِدِ فِي قَيْئِهِ قَالَ هَمَّامٌ وَقَالَ قَتَادَةُ وَلاَ نَعْلَمُ الْقَىْءَ إِلاَّ حَرَامًا  

The Prophet ﷺ said: It is not lawful for a man to make a donation or give a gift and then take it back, except a father regarding what he gives his child. One who gives a gift and then takes it back is like a dog which eats and vomits when it is full, then returns to its vomit.  

عَنِ النَّبِيِّ ﷺ قَالَ لاَ يَحِلُّ لِرَجُلٍ أَنْ يُعْطِيَ عَطِيَّةً أَوْ يَهَبَ هِبَةً فَيَرْجِعَ فِيهَا إِلاَّ الْوَالِدَ فِيمَا يُعْطِي وَلَدَهُ وَمَثَلُ الَّذِي يُعْطِي الْعَطِيَّةَ ثُمَّ يَرْجِعُ فِيهَا كَمَثَلِ الْكَلْبِ يَأْكُلُ فَإِذَا شَبِعَ قَاءَ ثُمَّ عَادَ فِي قَيْئِهِ  

The Prophet ﷺ said: The similitude of the one who takes back what he gifted is like that of a dog which vomits and then it eats vomit. When a donor seeks to take back (his gift), it should be made known and he informed why he sought to take it back. Then whatever he donated should be returned to him.  

عَنْ رَسُولِ اللَّهِ ﷺ قَالَ مَثَلُ الَّذِي يَسْتَرِدُّ مَا وَهَبَ كَمَثَلِ الْكَلْبِ يَقِيءُ فَيَأْكُلُ قَيْئَهُ فَإِذَا اسْتَرَدَّ الْوَاهِبُ فَلْيُوَقَّفْ فَلْيُعَرَّفْ بِمَا اسْتَرَدَّ ثُمَّ لِيُدْفَعْ إِلَيْهِ مَا وَهَبَ