One Koranic verse is an exact translation of a stanza in the Yajurveda. This was pointed out by the great research scholar Pandit Satavlekar of Pardi in one of his articles.
Note Another scholar points out that the following teaching from the Koran is exactly similar to the teaching of the Kena Upanishad (1.7).
The Koran
Sight perceives Him not. But He perceives men's sights; for He is the knower of secrets the Aware.
Kena Upanishad
That which cannot be seen by the eye but through which the eye itself sees know That to be Brahman (God) and not what people worship here (in the manifested world).
A simplified meaning of both the above verses reads
God is one and that He is beyond man's sensory experience.
