It is narrated from Sayyiduna Imran bin Husayn (may Allah be pleased with him) that a man freed six slaves at the time of his death, and he had no wealth other than them. The Messenger of Allah (peace and blessings be upon him) cast lots among them, freed two and kept four in slavery.
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15392