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”"
Sahih IsnaadSahih IsnaadHasanBook 32 · Hadith 18