Whoever comes to own a close relative within the prohibited degrees of kinship, that relative is set free.
حدثنا محمد بن سليمان حدثنا عبد الوهاب عن سعيد عن قتادة
من ملك ذا رحم محرم فهو حر
[Sahih] Yunus narrated it from Hasan through him, and Ibn Abu Shayba reported it in Musannaf*, no. 20079.