عَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَنْ عُرِضَ عَلَيْهِ رَيْحَانٌ فَلَا يَرُدُّهُ فَإِنَّهُ خَفِيفُ الْمَحْمَلِ طَيِّبُ الرّيح» . رَوَاهُ مُسلم

Ibn ‘Abbas reported God’s Messenger as saying, "One who seeks to take back a gift is like a dog which returns to its vomit. An evil example does not apply to us*.”* i.e. to Muslims.Bukhari transmitted it.