Joined Aug 2009
6,122 Posts | 473+
Londinium
Not true.
The devshirme system is simply the modified version of the Ghulam and Ghilman systems , the roots of it lying in the Azatan class of the Sassanids.
You can find similar examples from the Abbasids to the Mamlukes.
If you read the rest of the post you quoted, your see i'm basing that information
on what i have been told in this thread.
I didn't know it was such a central part Islam though (Abbasids to the Mamlukes).