Chapter: The virtue of spending and giving charity to relatives, spuses, children and parents, even if they are idolaters
Maimuna bint Harith reported that she set free a slave-girl during the lifetime of the Messenger of Allah ( صلی اللہ علیہ وسلم ) and she made a mention of that to the Messenger of Allah ( صلی اللہ علیہ وسلم ) and he said: Had you gives her to your maternal uncles, you would have a greater reward.
Authentic