24:40
أَوْ كَظُلُمَٰتٍۢ فِى بَحْرٍۢ لُّجِّىٍّۢ يَغْشَىٰهُ مَوْجٌۭ مِّن فَوْقِهِۦ مَوْجٌۭ مِّن فَوْقِهِۦ سَحَابٌۭ ۚ ظُلُمَٰتٌۢ بَعْضُهَا فَوْقَ بَعْضٍ إِذَآ أَخْرَجَ يَدَهُۥ لَمْ يَكَدْ يَرَىٰهَا ۗ وَمَن لَّمْ يَجْعَلِ ٱللَّهُ لَهُۥ نُورًۭا فَمَا لَهُۥ مِن نُّورٍ
Or [they are] like darknesses within an unfathomable sea which is covered by waves, upon which are waves, over which are clouds - darknesses, some of them upon others. When one puts out his hand [therein], he can hardly see it. And he to whom Allah has not granted light - for him there is no light.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
Two Examples of two kinds of Disbelievers
These are two examples which Allah sets forth of two kinds of disbelievers. Similarly He sets forth two parables of the hypocrites at the beginning of Surat Al-Baqarah: one involving fire and the other involving water. Similarly, in Surat Ar-Ra`d He gives two parables of the guidance and knowledge that are instilled in the heart, again involving fire and water; we have discussed each of them in the appropriate place and there is no need to repeat it here, praise be to Allah. The first of these two examples is that of the disbelievers who call others to their disbelief, thinking that they have good actions and beliefs, when this is not in fact the case. Their likeness is that of a mirage which is seen in a desert plain, looking from a distance as if it is a deep sea. The word Qi`ah refers to a vast, flat, level area of land in which the mirage may appear. There are different kinds of mirage, one which appears after midday, and another which appears in the morning and looks like water between heaven and earth. If a person who is in need of water sees the mirage, he thinks that it is water so he heads towards it in order to drink from it, but when he reaches it,
لَمْ يَجِدْهُ شَيْئاً
(he finds it to be nothing.); Similarly the disbeliever thinks that he is doing something good and that he has achieved something, but when Allah judges him on the Day of Resurrection, and brings him to account and examines his deeds, he will find that nothing has been accepted at all, either because of a lack of sincere belief or because he did not follow the proper ways of the Shari`ah. As Allah says:
وَقَدِمْنَآ إِلَى مَا عَمِلُواْ مِنْ عَمَلٍ فَجَعَلْنَاهُ هَبَآءً مَّنثُوراً
(And We shall turn to whatever deeds they did, and We shall make such deeds as scattered floating particles of dust.) 25:23. And He says here: