حَدَّثَنَا مُحَمَّدُ بْنُ سُلَيْمَانَ، حَدَّثَنَا عَبْدُ الْوَهَّابِ، عَنْ سَعِيدٍ، عَنْ قَتَادَةَ، عَنِ الْحَسَنِ، قَالَ مَنْ مَلَكَ ذَا رَحِمٍ مَحْرَمٍ فَهُوَ حُرٌّ ‏.‏

Qatadah reported 'Umar b. al-Khattab (ra) as saying: If anyone gets possession of a relative who is within the prohibited degrees, that person becomes free. Translation Not Available

Book Ref: Sunan Abi Dawud Book 31 Hadith 3951
Web Ref:  Sunan Abi Dawud Book 30 Hadith 3940