[For them is brief] enjoyment in this world; then to Us is their return; then We will make them taste the severe punishment because they used to disbelieve.
Allah is Far Above taking a Wife or having Children
Allah criticizes those who claim that He has,
وَلَداً سُبْحَـنَهُ هُوَ الْغَنِيُّ
(...begotten a son. Glory is to Him! He is Rich (Free of all needs).) He is Greater than that and above it. He is Self-Sufficient, free of want or need of anything. Everything else is in desperate need of Him,
لَهُ مَا فِى السَّمَـوَت وَمَا فِى الاٌّرْضِ
(His is all that is in the heavens and all that is in the earth.) So how can He have a son from what He has created Everything and everyone belongs to Him and is His servant.
إِنْ عِندَكُمْ مِّن سُلْطَانٍ بِهَـذَآ
(No warrant have you for this) Meaning, you have no proof for the lies and falsehood that you claim,
It was said in the last verse (64) that, for the friends of Allah, there is the good news in the worldly life and in the Hereafter. As for the good news of the Hereafter, it will come at the time of death when the spirit of the deceased will be taken to Allah. At that time, he will hear the good news of Paradise being for him. Then, on the day of Qiyamah, when he rises from his grave, he will receive the good news of being welcome to Paradise. This is similar to what al-Tabarani has reported from Sayyidna Ibn ` Umar ؓ narrates that the Holy Prophet ﷺ said: ` People who recite: لا إلہ إلا اللہ (la ilaha illallah: There is no god but Allah) will not experience any fright at the time of death, nor inside the grave, nor at the time they rise from it. This is as if my eyes are seeing the scenario of that time when these people will, shaking the dust off, rise from their graves, saying: الْحَمْدُ لِلَّـهِ الَّذِي أَذْهَبَ عَنَّا الْحَزَنَ (Praised is Allah who has removed from us [ all ] grief - 35:34) '
In the present world nobody loses anything by rejection of the Truth or shirk (assigning partners to God). This leads to great misunderstanding. But, this state of affairs comes about simply because of the respite given to man during his period of trial. In the present world man has been given freedom of action, so that he may be put to the test. The moment the period of testing is over, the present condition will also come to an end. At that time man will see that he has been left with none of those things of which he considered himself the owner, and on account of which he had become arrogant. It has been recorded in a tradition of the Prophet Muhammad that God apostrophied wisdom, saying, ‘O, wisdom! In this universe I have not created anything superior to you, anything more beautiful or any creature better than you.’ The necessary consequence of the grant of such a great boon to a human being is that his responsibility should also be great. That is why rejection of truth is the greatest crime before God. When Truth is proved by reasoning, it becomes necessary for man to accept it. If, even after the truth has been proved by arguments, a man rejects it, then he is committing an unpardonable crime. When God has given to man the wisdom by which he may recognise the Truth as Truth and falsehood as falsehood, in such a situation there can be no excuse for his wrongdoing before God.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.