It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both); Hisham reported it as mawquf (as Ibn Abbas's own words), while the other narrators reported it as marfu' from the Prophet (peace and blessings be upon him), that he (peace and blessings be upon him) said: "The one who takes back his gift is like the one who goes back to his vomit."
Hammam added: Qatadah said: We know of vomit only as unlawful.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10646