(Likewise, no Messenger came to those before them but they said: "A sorcerer or a madman!") Allah the Exalted and Most Honored said,
أَتَوَاصَوْاْ بِهِ
(Have they transmitted this saying to these), meaning, have those of the past taught these words to the people of the present
بَلْ هُمْ قَوْمٌ طَـغُونَ
(Nay, they are themselves a people transgressing beyond bounds!) They are tyrannical people whose hearts are the same. Therefore, the latter said the same as those before them have said. Allah the Exalted said,
مَا أُرِيدُ مِنْهُم مِّن رِّزْقٍ (I do not want any sustenance from them, nor do I want them to feed Me...51:57). It means that by creating jinn and mankind, Allah does not stand in need of them, so that they will have to produce sustenance for Him or for themselves or for any of His other creations or that they earn to feed Him. This has been stated according to the general trend of people. The most affluent of men buys a slave and spends on him not for nothing, but he has an underlying purpose: He expects the slaves to work for him, help him in his tasks, fulfill his needs and earn livelihood for his master. Allah is immaculate, pure and above all these things. In creating human beings, He does not profit or benefit anything.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 56–59
God Himself possesses all kinds of powers. However, He has created the angels to effect the administration of His vast domain. But, the case of human beings is different. Human beings were not created to fulfill any administrative or other need of God. The sole purpose of their creation was their devotion and servitude (‘ibadah) to God. This implies bowing down without any reservation before God completely and dedicating oneself entirely to Him. The substance of this devotion is deep inner realisation of God (ma‘rifah) (Tafsir ibn Kathir). In other words, it is required of man that God should be a discovery for him. He should recognise God without seeing him. This is essential to ma‘rifah. The shape which the life of a man takes as a result of this ma‘rifah is one of devotion and subservience.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.