Imran bin Husayn (may Allah be pleased with him) says that a man freed six slaves at the time of his death, and he had no other wealth. The Messenger of Allah (peace and blessings be upon him) called for them and divided them into three groups, then drew lots between them. He freed two and kept four in slavery, and he also spoke severely (about the man).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب العتق / 21392