Enslavement Of Persians Vs. Quranic Abolition: History Or Religion?
The prisoners of war, who were the free men, were captured and distributed too. There were no huge jails then to keep them in. They were kept unless they paid their ransom or released as an act of generosity or exchanged for Muslim prisoners of war. Some of them never returned to their homelands and lived in Madian, Kufa, Basra, and other parts of Arabia. That is why you never found them sold and resold, unlike other slaves.