Because it does not mention the option of slavery in dealing with prisoners. Either Muslims free them or take something in return for release, but the option of slavery does not exist. It is your right, dear reader, to be surprised and say, “But the Quran has repeatedly spoken about what those whom your right hands possess, who are the slaves, so then how do you say that the Quran does not legitimize slavery?”Try to understand me. To legitimize slavery in the sense that Muslims are allowed to take slaves from the prisoners according to Quranic text, and this did not happen. In other words, the Quran deals with mercy in the existing situation, but it does not legitimize the occurrence of slavery.

Source: Egypt Independent December 26, 2018 11:36 UTC