His father brought him to Allah's Messenger (ﷺ) and said, "I have given this son of mine a slave, who was belonging to me." Allah's Messenger (ﷺ) asked, "Have you given all your children the like of him?" He replied, "No." Allah's Messenger (ﷺ) then said, "Take him back then."

My father went then to the Prophet (ﷺ) to call him as a witness to my Sadaqah (i.e. gift) and he asked, "Have you done the same with all your children?" He replied, "No." He said, "Fear Allah and treat your children equally." My father then returned and took back that gift. [Agreed upon].

He said, "Call someone other than me as a witness to this." He then said, "Would you like them to be equal in their kind treatment of you?" He replied, "Yes." He said, "Don't do it, then."