In verse وَإِن مَّا نُرِيَنَّكَ بَعْضَ الَّذِي نَعِدُهُمْ أَوْ نَتَوَفَّيَنَّكَ (And if We show you some of what We promise them, or We take you back to Us), it is to comfort and assure the Holy Prophet ﷺ that he has been given the good news that the promises Allah has made to him that Islam will have the final victory and disbelief and disbelievers will be disgraced shall come to pass definitely. But, he is told, 'you should not concern yourself as to when this victory will finally come.' May be, this happens within his life time, and it is also possible that it comes after his departure from this mortal world. ` For your peace of heart, even this much is enough that you are continuously witnessing that We are causing the lands of the dis-believers to keep being sliced off their sides,' that is, these sides pass on under Muslim control whereby the land occupied by them keeps reducing in area. This causes well-being for Muslims and a day will come when the final phase of their victory shall stand completed. The command is in the very hands of Allah Ta` ala. There is no one who can avert this command. And He is the One swift at reckoning.
Allah said to His Messenger ,
`(Whether We show you) O Muhammad, part of the disgrace and humiliation We have promised your enemies in this life,
(or cause you to die) before that,
(your duty is only to convey We have only sent you to convey to them Allah's Message, and by doing so, you will have fulfilled the mission that was ordained on you,
(and on Us is the reckoning), their reckoning and recompense is on Us.' Allah said in similar Ayat,
(So remind them - you are only one who reminds. You are not a dictator over them - Save the one who turns away and disbelieves. Then Allah will punish him with the greatest punishment. Verily, to Us will be their return, Then verily, for Us will be their reckoning.)88:21-26 Allah said next,
(See they not that We gradually reduce the land from its outlying borders.) Ibn `Abbas commented, "See they not that We are granting land after land to Muhammad ()" Al-Hasan and Ad-Dahhak commented that this Ayah refers to Muslims gaining the upper hand over idolators, just as Allah said in another Ayah,
(And indeed We have destroyed towns round about you.) 46:27