Question: Is it jāiz (permissible) to say Allah takes revenge?
Allahu taālās taking revenge means His punishing evil doers. It is permissible and necessary to say that Allah will take revenge. It is necessary to communicate the fact that people will not get away with the evils they have perpetrated.
One of the 99 Beautiful Names of Allahu taālā is al-Muntaqim, which means the One who takes revenge. He is the Owner of Vengeance. (Sūrat-u Āl-i Imrān, 4; Sūrat-ul-Māida, 95; Sūrat-u Ibrāhīm, 47; Sūrat-uz-Zumar, 37)
In the Holy Quran Allahu taālā says, We will take revenge or We take revenge (Sūrat-us-Sajdah, 22; Sūrat-uz-Zukhruf, 41; Sūrat-ud-Dukhān, 16).
And He also says, We took vengeance (Sūrat-ul-Arāf, 136; Sūrat-ul-Hijr, 79; Sūrat-uz-Zukhruf:25, 55).
The matter Allahu taālās taking vengeance, which appear in the Qurān al-karīm and religious books, means His punishing the guilty. He will get the rights of the oppressed people from their oppressors. He will take revenge on and punish the betrayers who drag humans into Jahannam (Hell). He will also take His own rights from whomever He wishes.
Some related ahādīth are as follows:
(Allahu taālās awliyā among the public are the people of hunger and thirst. Allahu taālā takes revenge on and makes Jannat [Paradise] harām for those who cause them distress.) [Ibni Najjar]
(Fear Allah! If a Believer does injustice to another Believer, Allahu taālā will definitely take the revenge of the oppressed person on his oppressor on the Day of Resurrection.) [A.b. Hamid]
(He who disobeys his parents and who wanders with the unjust is an evil doer. Allahu taālā declares, We undoubtedly take revenge on evil doers.) [Tabarānī]
(Allahu taālā declares, By My glory and majesty, just as I take revenge on the unjust, so I take revenge on those who do not help the oppressed, though they have power to help.) [Hākim]
Therefore, we must not slight any sin, for Allahu taālā is the One who takes revenge. He does not fear anybody in doing what He wishes. He has concealed His wrath in sins. Any sin which is supposed to be small may cause His vengeance, His wrath. He may refuse eternally a liked slave of His who has been worshiping for a hundred thousand years for one single sin, nor does He fear anything. The Qurān al-karīm informs of this fact and communicated that the Devil (Shaitan), who had been obeying Him for two hundred thousand years, became eternally accursed because he was too arrogant to prostrate. A son of Hadrat Ādams was eternally expelled by Him because he killed a man.
Balam bin Bāūrā, during the time of Hadrat Mūsā, knew the Ism-i azām. Every prayer of his would be accepted (by Allahu taālā). His knowledge was in such a high degree that two thousand people would be present with him to write what he said. This Balām, showing a little inclination towards one harām of Allahu taālās, died without īmān. He became the subject of public talk which said, Those who are like him are like dogs.
Qārūn was a relative of Hadrat Mūsās. Having been blessed with the benedictions of Hadrat Mūsā, and being taught the knowledge of chemistry by him, he had become so rich that only the keys of his treasuries would be carried by forty mules. Because he did not pay the zakāt, he was made to go under the earth together with his entire property.
Allahu taālā has avenged upon many other people like these on account of one sin. Then Believers must be very much afraid of committing sins. Upon committing one small sin, they must repent and beg for forgiveness.
Although rain, the damage caused by lightning, earthquakes take place in certain chains of events called the laws of nature, the real Creator of them is Allahu taālā, because one of the fundamentals of īmān is to have belief in that khair (good) and sharr (evil) are from Allah. The poet says:
Everything belongs to Allah but is worked by slaves,
Even a chaff of straw does not move unless He wills.
If a traffic accident happens or if one person kills another person, it is Allahu taālā again who has created it. He has made such things causes for the death of those people. The poet says again:
Allah takes His revenge by means of His slave,
One without ilm-i ladun deems it the deed of that slave.