Gifts
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا ابْنُ طَاوُسٍ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم " الْعَائِدُ فِي هِبَتِهِ كَالْكَلْبِ يَقِيءُ، ثُمَّ يَعُودُ فِي قَيْئِهِ ".Narrated Ibn `Abbas:The Prophet (ﷺ) said, "One who takes back his gift (which he has already given) is like a dog that swallows its vomit
From Sahih al-Bukhari, whose reports the scholars accept as authentic.