Sahih (Sahih Muslim)
وَحَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، أَخْبَرَنَا الْمَخْزُومِيُّ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا عَبْدُ اللَّهِ، بْنُ طَاوُسٍ عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ " الْعَائِدُ فِي هِبَتِهِ كَالْكَلْبِ يَقِيءُ ثُمَّ يَعُودُ فِي قَيْئِهِ " .
Abdullah b. Tawus reported on the authority of his father who reported from Ibn Abas (Allah be pleased with them) who reported from Allah's Messenger 'may peace be upon him) that he said:One who gets back his gift is like a dog which vomits and then swallows that vomit