Certainty is mentioned in the Quran in these verses:

[2:118] Those who possess no knowledge say, “If only God could speak to us, or some miracle could come to us!” Others before them have uttered similar utterances; their minds are similar. We do manifest the miracles for those who have attained certainty.

[5:50] Is it the law of the days of ignorance that they seek to uphold? Whose law is better than God’s for those who have attained certainty?

[6:75] We showed Abraham the marvels of the heavens and the earth, and blessed him with certainty:

[13:2] God is the One who raised the heavens without pillars that you can see, then assumed all authority. He committed the sun and the moon, each running (in its orbit) for a predetermined period. He controls all things, and explains the revelations, that you may attain certainty about meeting your Lord.

[15:99] And worship your Lord, in order to attain certainty.

[30:60] Therefore, you shall steadfastly persevere – for God’s promise is the truth – and do not be intimidated by those who have not attained certainty.

[32:12] If only you could see the guilty when they bow down their heads before their Lord: “Our Lord, now we have seen and we have heard. Send us back and we will be righteous. Now we have attained certainty.”

[32:24] We appointed from among them imams who guided in accordance with our commandments, because they steadfastly persevered and attained certainty about our revelations.

[52:34] Let them produce a Hadith like this, if they are truthful.

[52:35] Were they created from nothing? Are they the creators?

[52:36] Did they create the heavens and the earth? Indeed, they have no certainty.

[74:43] They will say, “We did not observe the contact prayers (Salat).

[74:44] “We did not feed the poor.

[74:45] “We blundered with the blunderers.

[74:46] “We disbelieved in the Day of Judgment.

[74:47] “Until certainty came to us now.”

[102:1] You remain preoccupied with hoarding.

[102:2] Until you go to the graves.

[102:3] Indeed, you will find out.

[102:4] Most assuredly, you will find out.

[102:5] If only you could find out for certain.

[102:6] You would envision Hell.

[102:7] Then you would see it with the eye of certainty.

[102:8] Then you will be questioned, on that day, about the blessings you had enjoyed.

To learn more, read the Quran in English.

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