فِى قُلُوبِهِم مَّرَضٌ فَزَادَهُمُ ٱللَّهُ مَرَضًا ۖ وَلَهُمْ عَذَابٌ أَلِيمٌۢ بِمَا كَانُوا۟ يَكْذِبُونَ
5:53; 9:125; 74:32.
Important Words:
مرض (disease) is derived from مرض i.e. he fell ill; he lost his health. Thus مرض means, anything whereby a man loses his health (physical, moral or spiritual); disease or hypocrisy; doubt or darkness or loss; omission of any kind (Aqrab); any disease or any physical or moral weakness or defect of faith, in fact, anything that hinders man’s physical, moral or spiritual progress (Mufradat).
یكذبون (they lie) is derived from كذب which means, he lied; he said what was untrue while he knew the truth; he gave a wrong account of something, whether intentionally or unintentionally; it (the heart or the eye) felt or perceived wrongly (Aqrab); he said what was true but said it insincerely, i.e. he himself believed the thing to be untrue (the Quran 63:2). كذب(kadhdhaba) is the causative or transitive form from كذب. They say كذبه i.e. he accused him of lying; he attributed falsehood to him in his claim or statement; he pronounced him a liar. كذب به means, he rejected and disbelieved it. كاذبmeans a liar, and كذاب means a great and habitual liar. كذب (kadhib) and كذاب (kidhdhab) mean, falsehood, lie, untruth; also the act of uttering a lie. كذاب also means the act of accusing one of lying (Lane & Aqrab).
Commentary:
God speaks of two diseases of the heart: (1) كفر i.e. disbelief; and (2) نفاق i.e. hypocrisy. The former has already been referred to in verses 7 and 8. The present verse refers to the disease of hypocrisy and points out that those suffering from it do not act as normal healthy persons do.
The Holy Prophet has mentioned the following signs of hypocrisy. Says he: "When a hypocrite speaks, he lies; and when he makes a promise, he does not fulfil it; and when he is entrusted with anything, he acts dishonestly and when he makes a contract, he breaks it; and when he engages in a dispute, he uses foul words" (Bukhari).
In the verse under comment the increase of hypocrisy is attributed to God, not because God increases it but because the increase results from disregard of His commands; also because it is God who finally dispenses the good and evil consequences of human actions. The Quran has only been revealed for healing diseases. Says Allah: O mankind! There has come to you an exhortation from your Lord and a cure for whatever disease there is in the hearts (10:58).
The increasing of disease also means that the expanding power of Islam was naturally increasing the disease of the hypocrites who were all the more forced to remain, against their will, in outward friendliness with the Muslims.
In the case of disbelievers the punishment mentioned is عذاب عظیم (great punishment), whereas in the case of hypocrites it is عذاب الیم(grievous punishment). This is because disbelievers express their disbelief and enmity openly, while hypocrites keep their feelings of hatred and malice concealed in their hearts, thinking that they are thereby deriving twofold pleasure—one of enmity towards Islam and the other, of befooling the Muslims. So the retribution in store for the hypocrites is characterized by special pain and anguish—a fit recompense for their false pleasure.
5:53; 9:125; 74:32.
God has shown so many Signs in support of Islam and it has become gradually so powerful that the hypocrites have become more and more afraid of Muslims and have consequently grown in their hypocrisy.