Narrated Abu Hurairah: 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.
Hadith Referenceسنن ابي داود / كتاب العتق / 3934
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (2527) صحيح مسلم (1503), وانظر الحديث الآتي (3938),
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates as a marfu’ hadith: The Noble Prophet (peace and blessings be upon him) said: “If a slave is jointly owned by two people and one of them frees his share, then if he is affluent, he must pay the full price of the slave. And if he does not have wealth, then the slave will be made to work and will not be subjected to hardship.”
Shaykh Muhammad Ibrahim bin Basheer
Benefit: This hadith proves that Islam teaches kindness and goodness even towards slaves, and oppression and coercion are absolutely forbidden.
In this hadith, a legal issue regarding a slave is mentioned: if a slave has two owners and one of them frees his share, then the slave becomes half-free and half-slave. In such a case, the other owner should also free his share so that the slave becomes completely free.
Now, there are two ways to achieve this: either the slave pays the other owner the price and becomes free, or, if he does not have the money, he should be made to work according to his capacity, and through hard work and effort, he should collect the amount and pay it to his other owner and thus become fully free.
Islam does not approve of a person being half-free and half-slave, because in such a case, how would the legal punishments (hudud) be applied? There are also many other religious issues; when someone is half-slave and half-free, he will face many difficulties. Also see (Fath al-Bari: 1/219)
Source: Musnad al-Humaydi: Commentary by Muhammad Ibrahim bin Bashir, Page: 1122