Wama kana linafsin an tamoota illa bi-ithni Allahi kitaban mu-ajjalan waman yurid (surah Al Imran: 145)

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

(3:145) It is not given to any soul to die except with the leave of Allah, and at an appointed time. *104 And he who desires his reward in this world, We shall grant him the reward of this world; and he who desires the reward of the Other World, *105 We shall grant him the reward of the Other World. And soon shall We reward the ones who are grateful. *106

Wa maa kaana linafsin an tamoota illaa bi iznillaahi kitaabam mu`ajjalaa; wa mai yurid sawaabad dunyaa nu`tihee minhaa wa mai yurid sawaabal Aakhirati nu`tihee minhaa; wa sanajzish shaakireen

*104). The purpose of this directive is to bring home to the Muslims that it would be futile for them to try to flee from death. No one can either die before or survive the moment determined for death by God. Hence one should not waste one's time thinking how to escape death. Instead, one should take stock of one's activities and see whether one's efforts have either been directed merely to one's well-being in this world or to well-being in the Hereafter.
*105). The word thawab denotes recompense and reward. The 'reward of this world' signifies the totality of benefits and advantages which a man receives as a consequence of his actions and efforts within the confines of this world. The 'reward of the Other World' denotes the benefits that a man will receive in the lasting World to Come as the fruits of his actions and efforts. From the Islamic point of view, the crucial question bearing upon human morals is whether a man keeps his attention focused on the worldly results of his endeavours or on the results which will acrue to him in the Next World.
*106). The 'ones who are grateful' are those who fully appreciate God's favour in making the true religion available to them, and thereby intimating to them knowledge of a realm that is infinitely vaster than this world. Such people appreciate that God has graciously informed them of the truth so that the consequences of human endeavour are not confined to the brief span of earthly life but cover a vast expanse, embracing both the present life and the much more important life of the Hereafter.
A grateful man is he who, having gained this breadth of outlook and having developed this long-range perception of the ultimate consequences of things, persists in acts of righteousness out of his faith in God and his confidence in God's assurance that they will bear fruit in the Hereafter. He does so even though he may sometimes find that, far from bearing fruit, righteousness leads to privation and suffering in this world. The ungrateful ones are those who persist in a narrow preoccupation with earthly matters. They are those who disregard the evil consequences of unrighteousness in the Hereafter, seizing everything which appears to yield benefits and advantages in this world, and who are not prepared to devote their time and energy to those acts of goodness which promise to bear fruit in the Hereafter and which are either unlikely to yield earthly advantages or are fraught with risks. Such people are ungrateful and lack appreciation of the valuable knowledge vouchsafed to them by God.