Give gifts without expecting anything in return

This hadith speaks about the importance of giving gifts without expecting anything in return. It is not permissible to take back a gift, except in the case of a father and his son. The hadith uses an analogy of a dog eating until it is full and then vomiting it out again to explain this concept further. Ash-Shafi'i used this hadith as proof that it is only lawful for one who confers something to take it back if they are a father taking something from their son. This hadith teaches us that we should give gifts with no expectations or strings attached, as taking them back would be like returning to our own vomit - something which would be considered disgusting by most people. We should also remember that even though fathers have more authority over their sons than anyone else, they should still treat them with respect when taking things away from them or asking for things back from them.