(14) باب فَضْلِ النَّفَقَةِ وَالصَّدَقَةِ عَلَى الْأَقْرَبِينَ وَالزَّوْجِ وَالْأَوْلَادِ وَالْوَالِدَيْنِ وَلَوْ كَانُوا مُشْرِكِينَ
Maimuna bint Harith reported that she set free a slave-girl during the lifetime of the Messenger of Allah (ﷺ) and she made a mention of that to the Messenger of Allah (ﷺ) and he said:
Had you gives her to your maternal uncles, you would have a greater reward.
Reference: Sahih Muslim 999
In-book reference: Book 12, Hadith 54
USC-MSA web (English) reference(deprecated numbering scheme): Book 5, Hadith 2187