Men whom neither trade nor sale (business) diverts them from the Remembrance of Allâh (with heart and tongue), nor from performing As¬Salât (Iqâmat-as-Salât), nor from giving the Zakât. They fear a Day when hearts and eyes will be overturned (out of the horror of the torment of the Day of Resurrection). (37) That Allâh may reward them according to the best of their deeds, and add even more for them out of His Grace. And Allâh provides without measure to whom He wills[] (38) As for those who disbelieve, their deeds are like a mirage in a desert. The thirsty one thinks it to be water, until he comes up to it, he finds it to be nothing, but he finds Allâh with him, Who will pay him his due (Hell). And Allâh is Swift in taking account.[] (39) Or [the state of a disbeliever] is like the darkness in a vast deep sea, overwhelmed with waves topped by waves, topped by dark clouds, (layers of) darkness upon darkness: if a man stretches out his hand, he can hardly see it! And he for whom Allâh has not appointed light, for him there is no light. (40) See you not (O Muhammad SAW) that Allâh, He it is Whom glorify whosoever is in the heavens and the earth, and the birds with wings out-spread (in their flight)? Of each one He (Allâh) knows indeed his Salât (prayer) and his glorification, [or everyone knows his Salât (prayer) and his glorification], and Allâh is All-Aware of what they do. (41) And to Allâh belongs the sovereignty of the heavens and the earth, and to Allâh is the return (of all). (42) See you not that Allâh drives the clouds gently, then joins them together, then makes them into a heap of layers, and you see the rain comes forth from between them. And He sends down from the sky hail (like) mountains, (or there are in the heaven mountains of hail from where He sends down hail), and strike therewith whom He wills, and averts it from whom He wills. The vivid flash of its (clouds) lightning nearly blinds the sight. [Tafsir At-Tabarî]. (43)