They actually came from India.
Everything worth of positive mention about the so-called “Arabic/Islamic civilization”, whethr science, literature, arts or architecture, was originally Persian, Byzantine/Hellenistic or of more eastern origin transmitted through those late ancient Empires.
The thing medieval “Islamic civilization” could be credited with is conserving/transmitting parts of ancient knowledge (that was not destroyed by the esrly islsmic onslaught).
The Arab and Turkish element in science/art/culture was however minor. The smart ones were mostly Persians... creating a masdive inferiority complex among Arabs and Turks that is pervasive to this day.