And indeed it (this Quran) will be an anguish for the disbelievers

﴿وَإِنَّهُۥ لَحَسۡرَةٌ عَلَى ٱلۡكَٰفِرِينَ ﴾
[الحَاقة: 50]

And indeed it (this Quran) will be an anguish for the disbelievers (on the Day of Resurrection)

﴿وإنه لحسرة على الكافرين﴾ [الحَاقة: 50]

Al Bilal Muhammad Et Al
But truly it is a cause of sorrow for the unbelievers

Ali Bakhtiari Nejad
And it is certainly (cause of) a regret for the disbelievers

Ali Quli Qarai
And indeed it will be a [matter of] regret for the faithless

Ali Unal
It will surely be a bitter regret for the unbelievers

Hamid S Aziz
And verily, it is a source of great grief to the unbelievers

John Medows Rodwell
But it shall be the despair of infidels

Literal
And that it truly is grief/sadness (E) , on the disbelievers

Mir Anees Original
And it will certainly be (a source of) regret for the infidels

Mir Aneesuddin
And it will certainly be (a source of) regret for the disbelievers