Hadith 19

Bulugh al-Maram

Book 7: Business Transactions
وَعَنْهُ; { أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-نَهَى عَنْ بَيْعِ اَلْوَلَاءِ, وَعَنْ هِبَتِهِ } مُتَّفَقٌ عَلَيْهِ 1‏ .‏
[Ibn 'Umar (RA)]:

Allah's Messenger (ﷺ) forbade selling or giving away the right of inheritance from a freed slave. [Agreed upon].