A man manumitted a slave and he had no other property than that, so the Prophet ﷺ canceled the manumission (and sold the slave for him). Nu'aim bin Al-Nahham bought the slave from him. (Using translation from Bukhārī 2415)
أَنَّ رَجُلًا «أَعْتَقَ عَبْدًا لَهُ لَمْ يَكُنْ لَهُ مَالٌ غَيْرَهُ فَرَدَّهُ عَلَيْهِ رَسُولُ اللهِ ﷺ وَابْتَاعَهُ نُعَيْمُ بْنُ النَّحَّامِ»