Justification is mentioned in the Quran in these verses:

[7:146] I will divert from My revelations those who are arrogant on earth, without justification. Consequently, when they see every kind of proof they will not believe. And when they see the path of guidance they will not adopt it as their path, but when they see the path of straying they will adopt it as their path. This is the consequence of their rejecting our proofs, and being totally heedless thereof.

To learn more, read the Quran in English.

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