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) '
Imagining the sons and daughters of God is like imagining God on the lines of a human being. Man is the victim of shortcomings and limitations; he therefore needs children so that, through them he can compensate for these shortcomings and limitations. But imagining such a position in respect of God is absolutely baseless. The pattern of God’s creations itself confirms the existence of a Creator. The image of God which should be projected is that of one who is perfect to the final degree; one who is free of all kinds of flaws and deficiencies. Had God not been a perfect being, had He been full of shortcomings and defects, He would not have been able to create a universe like the present one and would not have been able to control it in the present, precisely regulated manner. This means that all the signs of heaven and the earth establish the existence of the one God, the concept of which has been presented by the prophets. But the concept of God devised for themselves by the polytheists has absolutely no proof in the present universe. Now, obviously, the polytheists’ acceptance of an unproved god shows that such people can never be successful, because how can a god who is actually non-existent come to help anybody or fulfil anybody’s wishes? God, who is really in existence, is not accepted by the polytheists and the god they accept does not exist anywhere. Under these circumstances, how can the polytheists be successful in the present universe? Their only possible fate will be to finally become helpless and without support and forever suffer disgrace and disappointment.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.