"Whoever sets free his share of a slave should set him free completely from his own wealth, if he has enough wealth to cover the price of the slave." (Using translation from Nasāʾī 4698)
أَنَّ النَّبِيَّ ﷺ قَالَ مَنْ أَعْتَقَ شِرْكًا لَهُ فِي عَبْدٍ أُتِمَّ مَا بَقِيَ فِي مَالِهِ إِنْ كَانَ لَهُ مَالٌ يَبْلُغُ ثَمَنَ الْعَبْدِ