Sunan an-Nasa'i 3704
It was narrated from Ibn Juraij, from Al-Hasan bin Muslim, from Tawus that the Messenger of Allah said:
"It is not permissible for anyone to give a gift then take it back, except a father." Tawus said: "I used to hear the boys say: 'O you who goes back to his vomit!' But I did not realize that the Messenger of Allah had said this as a parable, until we heard that he used to say: 'The likeness of the one who gives a gift then takes it back, is that of the dog which eats its vomit.'"
أَخْبَرَنَا عَبْدُ الْحَمِيدِ بْنُ مُحَمَّدٍ، قَالَ حَدَّثَنَا مَخْلَدٌ، قَالَ حَدَّثَنَا ابْنُ جُرَيْجٍ، عَنِ الْحَسَنِ بْنِ مُسْلِمٍ، عَنْ طَاوُسٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ لاَ يَحِلُّ لأَحَدٍ يَهَبُ هِبَةً ثُمَّ يَعُودُ فِيهَا إِلاَّ الْوَالِدَ ‏"‏ ‏.‏ قَالَ طَاوُسٌ كُنْتُ أَسْمَعُ الصِّبْيَانَ يَقُولُونَ يَا عَائِدًا فِي قَيْئِهِ وَلَمْ أَشْعُرْ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم ضَرَبَ ذَلِكَ مَثَلاً حَتَّى بَلَغَنَا أَنَّهُ كَانَ يَقُولُ ‏"‏ مَثَلُ الَّذِي يَهَبُ الْهِبَةَ ثُمَّ يَعُودُ فِيهَا ‏"‏ ‏.‏ وَذَكَرَ كَلِمَةً مَعْنَاهَا ‏"‏ كَمَثَلِ الْكَلْبِ يَأْكُلُ قَيْئَهُ ‏"‏ ‏.‏