Investigations are mentioned in the Quran in these verses:

[12:50] The king said, “Bring him to me.” When the messenger came to him, he said, “Go back to your lord and ask him to investigate the women who cut their hands. My Lord is fully aware of their schemes.”

[49:6] O you who believe, if a wicked person brings any news to you, you shall first investigate, lest you commit injustice towards some people, out of ignorance, then become sorry and remorseful for what you have done.

To learn more, read the Quran in English.

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