Sayyiduna Abu Hurayrah (may Allah be pleased with him) says that a man freed his share in a slave, so the Prophet (peace and blessings be upon him) charged him with paying its value.
Qatadah says: If he has no wealth, the slave should be made to work.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب العتق / 21374