Islamic views on slavery - Wikipedia
BBC - Religions - Islam: Slavery in Islam
Although Islam is much credited for moderating the age-old institution of slavery, which was also accepted and endorsed by the other monotheistic religions, Christianity and Judaism, and was a well-established custom of the pre-Islamic world, it has never preached the abolition of slavery as a doctrine.
ISIS, Slavery, and Islamic Abolitionism | HuffPost
The condition of slaves, like that of women, may well have improved with the coming of Islam, but the institution was not abolished, any more than it was under Christianity at this period.
While slavery was in theory greatly limited by Islamic law, in practice it persisted on a large scale in Muslim lands.
Unlike the Atlantic slave traders, Muslims enslaved people from many cultures as well as Africa. Other sources included the Balkans, Central Asia and Mediterranean Europe.
During the 20th century attitudes to slavery changed radically and in 1990 The Cairo Declaration on Human Rights in Islam stated that:
Slaves in the Islamic world were not always at the bottom of the social hierarchy. Slaves in Muslim societies had a greater range of work, and took on a wider range of responsibilities, than those enslaved in the Atlantic trade.
Some other Muslim countries passed laws allowing for the prosecution not only of the sellers of slaves but the buyers too.
During her visit to Egypt, Murad met with President Abdel Fattah el-Sisi. She tweeted that she was "asking the Islamic world to stand firmly and clearly against ISIS."