The Chapters on Manumission (of Slaves)
19/5. Chapter:
If A Person Becomes The Master Of A Mahram, Then He Becomes Free
Sunan Ibn Majah
حَدَّثَنَا رَاشِدُ بْنُ سَعِيدٍ الرَّمْلِيُّ، وَعُبَيْدُ اللَّهِ بْنُ الْجَهْمِ الأَنْمَاطِيُّ، قَالاَ حَدَّثَنَا ضَمْرَةُ بْنُ رَبِيعَةَ، عَنْ سُفْيَانَ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنِ ابْنِ عُمَرَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ مَلَكَ ذَا رَحِمٍ مَحْرَمٍ فَهُوَ حُرٌّ " .
It was narrated from Ibn`Umar that the Messenger of Allah (ﷺ) said: “Whoever becomes the master of a Mahram relative, he becomes free.”
Reference : Sunan Ibn Majah 2525In-book reference : Book 19, Hadith 14English translation : Vol. 3, Book 19, Hadith 2525