Musnad Ahmad 2117

Ibn 'Umar and Ibn 'Abbas attributed to the Prophet (ﷺ) the words: “It is not permissible for a man to give something then take it back, except a father with regard to what he gives to his son. The likeness of the one who gives something then takes it back is that of a dog that eats until it is full, then it vomits, then it goes back to its vomit."