It is narrated from Hazrat Aisha (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) said: The right of inheritance through wala’ (the bond of emancipation) belongs only to the one who frees the slave.
Hadith Referenceمسند احمد / مسند النساء / 24722
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد فيه عمر بن أبى سلمة فهو ضعيف