Sahih
أَخْبَرَنَا مُحَمَّدُ بْنُ حَاتِمِ بْنِ نُعَيْمٍ، قَالَ حَدَّثَنَا حِبَّانُ، أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ حَنْظَلَةَ، أَنَّهُ سَمِعَ طَاوُسًا، يَقُولُ أَخْبَرَنَا بَعْضُ، مَنْ أَدْرَكَ النَّبِيَّ صلى الله عليه وسلم أَنَّهُ قَالَ " مَثَلُ الَّذِي يَهَبُ فَيَرْجِعُ فِي هِبَتِهِ كَمَثَلِ الْكَلْبِ يَأْكُلُ فَيَقِيءُ ثُمَّ يَأْكُلُ قَيْئَهُ " .
It was narrated from Hanzalah that he heard Tawus say:"Some of those who met the Prophet told us that he said: 'The likeness of the one who gives (something), then takes back his gift, is that of a dog which eats, then vomits, then eats its vomit