Nu'man b. Bashir reported that his father brought him to Allaah's Messenger (sallAllaahu alayhi wa sallam) and said: I have donated this slave of mine to my son. Allaah's Messenger (sallAllaahu alayhi wa sallam) said: Have you donated to every one of your sons (a slave) like this? He said: No. Thereupon Allaah's Messenger (may peace he upon him) said: Then take him back.