The Messenger of Allah ﷺ forbade selling or giving away the right to inheritance by a manumitted slave. (Using translation from Abū Dāʾūd 2919)  

«نَهَى رَسُولُ اللَّهِ ﷺ عَنْ بَيْعِ الْوَلَاءِ وَعَنْ هِبَتِهِ»  

All the persons depend upon Abdullah b. Dinar in regard to this hadith. (Using translation from Muslim 1506a)  

أَنَّ النَّبِيَّ ﷺ «نَهَى عَنْ بَيْعِ الْوَلَاءِ وَعَنْ هِبَتِهِ»  

[Machine] I heard Ibn Abbas say, "Allegiance cannot be bought nor given as a gift, rather allegiance is for the one who frees others."  

سَمِعْتُ ابْنَ عَبَّاسٍ يَقُولُ «لَا يُبَاعُ الْوَلَاءُ وَلَا يُوهَبُ وَالْوَلَاءُ لِمَنْ أَعْتَقَ»  

[Machine] "Abdullah, loyalty is like flesh, it cannot be bought or gifted."  

عَبْدُ اللَّهِ «الْوَلَاءُ لُحْمَةٌ كَلُحْمَةِ النَّسَبِ لَا يُبَاعُ وَلَا يُوهَبُ»  

[Machine] "From Al-Hasan and Sa'id ibn Al-Musayyib, they despised selling loyalty."  

عَنْ الْحَسَنِ وَسَعِيدِ بْنِ الْمُسَيِّبِ «أَنَّهُمَا كَرِهَا بَيْعَ الْوَلَاءِ»  

[Machine] Ibn Abbas, loyalty cannot be sold, meaning it cannot be consumed by the enslavement of a person twice.  

ابْنُ عَبَّاسٍ لَا يُبَاعُ الْوَلَاءُ أَيُؤْكَلُ بِرَقَبَةِ رَجُلٍ مَرَّتَيْنِ