Sahih al-Bukhari 2534
Sahih al-Bukhari · Book 49: Manumission of Slaves · The selling of a Mudabbar
Narrated Jabir bin `Abdullah:
حَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ ، حَدَّثَنَا شُعْبَةُ ، حَدَّثَنَا عَمْرُو بْنُ دِينَارٍ ، سَمِعْتُ جَابِرَ بْنَ عَبْدِ اللَّهِ ـ رضى الله عنهما ـ قَالَ أَعْتَقَ رَجُلٌ مِنَّا عَبْدًا لَهُ عَنْ دُبُرٍ، فَدَعَا النَّبِيُّ صلى الله عليه وسلم بِهِ فَبَاعَهُ. قَالَ جَابِرٌ مَاتَ الْغُلاَمُ عَامَ أَوَّلَ.
A man amongst us declared that his slave would be freed after his death. The Prophet (ﷺ) called for that slave and sold him. The slave died the same year.