But those who disbelieved - their deeds are like a mirage in (24:39)

Almuntakhab Fi Tafsir Alquran Alkarim

As for those who deny Allah and do not acknowledge His Messengers missions, their hopes shall be doomed to disappointment. Their deeds shall avail them nothing but the frustration or non-fulfillment of expectation, a situation standing similitude exact of a mirage* falsely viewed by the parched and thirsty traveler as water, and when he reaches the spot in question his hopes are doomed to disappointment. He finds what is known to be at variance with fact, an optical illusion. But he finds Allah, the Omnipresent, the truth personified, Who requites him with what is commensurate with his deeds, and Allah is swift indeed in putting the law in execution

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(24:39) (On the other hand,) the deeds of those who disbelieved, *70 maybe likened to a mirage in a waterless desert, which the thirsty one took for water; but when he reached there he found nothing to drink; nay, he found there Allah Who settled his full account, and Allah is very swift at reckoning. *71

But those who disbelieved - their deeds are like a mirage in meaning

*70) That is, they refused to accept sincerely the Divine Message which was brought by the Prophets, and which at that time was being given by the Prophet Muhammad (Allah's peace and blessings be upon him). These verses clearly show that the truthful and righteouse believers only can benefit from Allah's Light. In contrast to them, the state of those people is being described here, who refused to believe and obey the Holy Prophet, who was the real and sole means of attaining the Light of Allah.
*71) This parable describes the condition of those people who, in spite of disbelief and hypocrisy, practise some good deeds and also believe, among other things, in the life after death in the hope that their good deeds will be of some help to thetas in the Hereafter even if they did not believe and follow the Prophet and lacked the qualities of true believers. In this parable they are being told that their expectations of reaping benefits of their ostentatious deeds of virtue in the Hereafter are no more than a mirage. Just as a traveller in the desert takes the glittering sands for a surging pool of water and runs towards it for quenching his thirst, so are these people travelling on the road to death cherishing false hopes on account of their good deeds. But just as the one running towards a mirage does not find anything there to quench his thirst, so will these people find nothing to avail them when they enter the state of death. On the contrary, they will find Allah there, Who will require them to account for their disbelief, hypocrisy and misdeeds, which they committed along with their ostentatious deeds of virtue, and will deal with them in full justice.
 

But those who disbelieved - their deeds are like a mirage in meaning in Urdu

(اس کے برعکس) جنہوں نے کفر کیا ان کے اعمال کی مثال ایسی ہے جیسے دشت بے آب میں سراب کہ پیاسا اُس کو پانی سمجھے ہوئے تھا، مگر جب وہاں پہنچا تو کچھ نہ پایا، بلکہ وہاں اس نے اللہ کو موجود پایا، جس نے اس کا پورا پورا حساب چکا دیا، اور اللہ کو حساب لیتے دیر نہیں لگتی