Hadithcore
Mishkat al-Masabih, 3393

Al-Hasan, on Samura’s authority, reported God's Messenger as saying, “If anyone gets possession of a relative who is within the prohibited degrees, that person becomes free.” Tirmidhi, Abu Dawud and Ibn Majah transmitted it.

عَن الْحسن عَن سَمُرَة عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «من ملك ذَا رحم محرم فَهُوَ حُرٌّ» . رَوَاهُ التِّرْمِذِيُّ وَأَبُو دَاوُدَ وَابْنُ مَاجَه

References1 variant
In-Book Reference
Book 14, Hadith 12