oh hey clay, look, heres something else that i could google easily because my keyboard wasnt covered in snickers leavings

There is also the people-deceiving cult (threskeia) of the Ishmaelites, the forerunner of the Antichrist, which prevails until now. It derives from Ishmael, who was born to Abraham from Hagar, wherefore they are called Hagarenes and Ishmaelites. And they call them Saracens, inasmuch as they were sent away empty-handed by Sarah; for it was said to the angel by Hagar: "Sarah has sent me away empty-handed" (cf. Book of Genesis xxi. 10, 14).

The Fountain of Knowledge by John of Damascus ,c. 730 AD, Chapter On Heresy