(4) باب إِذَا أَعْتَقَ عَبْدًا بَيْنَ اثْنَيْنِ أَوْ أَمَةً بَيْنَ الشُّرَكَاءِ
Narrated Ibn `Umar:
The Prophet (ﷺ) said, "He who manumits his share of a slave and has money sufficient to free the remaining portion of that slave's price (justly estimated) then he should manumit him (by giving the rest of his price to the other co-owners)." Nafi` added, "Otherwise the slave is partially free." Aiyub is not sure whether the last statement was said by Nafi` or it was a part of the Hadith.
Reference: Sahih al-Bukhari 2524
In-book reference: Book 49, Hadith 9
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 46, Hadith 701