And We made upon the hearts of the polytheists coverings; lest they understand the Qur'an, and We made in their ears a deafness; lest they hear it, and when you mentioned your Lord in the Qur'an calling to His uniqueness forbidding from the polytheism with Him they turned on their backs as ones fleeing from your word; out of arrogance and thinking it too great that they unify Allah the Exalted in His worship.