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." (Using translation from Abū Dāʾūd 3538)
عَنِ النَّبِيِّ ﷺ قَالَ «الْعَائِدُ فِي هِبَتِهِ كَالْعَائِدِ فِي قَيْئِهِ» زَادَ هَمَّامٌ قَالَ قَتَادَةُ لَا نَعْلَمُ الْقَيْءَ إِلَّا حَرَامًا