The Women - 4:82 Do they not examine the Qur´an? Had it belonged to anyone other than Allah, they would have found many contradictions in it.
Related:
The Believers/23:68 Have they not examined the Word, or has something come to them which did not come to their ancestors of the past?

The Women/4:82 Do they not examine the Qur´an? Had it belonged to anyone other than Allah, they would have found many contradictions in it.

The Arabic Letter Sad/38:29 Blessed is this Book which We have sent down to you, that they may examine its verses and that those of understanding may take admonition.

Muhammad/47:24 Why do they not search and study the Qur´an? Or are their brains locked?