A man emancipated his share in a slave. The Prophet ﷺ allowed his (full) emancipation, and required him to pay the rest of his price. (Using translation from Abū Dāʾūd 3934)
أَنَّ رَجُلًا أَعْتَقَ شِقْصًا مِنْ مَمْلُوكٍ فَأَجَازَ النَّبِيُّ ﷺ عِتْقَهُ وَغَرَّمَهُ بَقِيَّةَ ثَمَنِهِ