(15) باب هِبَةِ الْمَرْأَةِ لِغَيْرِ زَوْجِهَا
Narrated Kuraib:
the freed slave of Ibn `Abbas, that Maimuna bint Al-Harith told him that she manumitted a slave-girl without taking the permission of the Prophet. On the day when it was her turn to be with the Prophet, she said, "Do you know, O Allah's Messenger (ﷺ), that I have manumitted my slave-girl?" He said, "Have you really?" She replied in the affirmative. He said, "You would have got more reward if you had given her (i.e. the slave-girl) to one of your maternal uncles."
Reference: Sahih al-Bukhari 2592
In-book reference: Book 51, Hadith 26
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 47, Hadith 765