It is narrated from Mughira that Ibrahim (may Allah have mercy on him) said: Women have no share in wala’ (the right of inheritance from a freed slave), except for the woman who herself frees a slave.
Hadith Referenceسنن دارمي / من كتاب الفرائض / 3185
Hadith Gradingتحقیق (حسین سلیم أسد الدارانی):إسناده صحيح إلى إبراهيم، [مكتبه الشامله نمبر: 3196]
Hadith Takhrijاس روایت کی سند صحیح ہے۔ دیکھئے: [ابن أبى شيبه 11556، 11671] ، [عبدالرزاق 16261] ، [ابن منصور 481]
Brief Explanation
(Commentary on Ahadith 3183 to 3185)
That is, when a woman herself emancipates her slave, then she will be the inheritor of his wealth.