The Quran

ضَرَبَ اللَّهُ مَثَلًا رَجُلًا فيهِ شُرَكاءُ مُتَشاكِسونَ وَرَجُلًا سَلَمًا لِرَجُلٍ هَل يَستَوِيانِ مَثَلًا ۚ الحَمدُ لِلَّهِ ۚ بَل أَكثَرُهُم لا يَعلَمونَ

Ali Unal

God strikes a parable: a man in the employment of many partners who continuously dispute with one another, and another man employed by one person: are those two equal in likeness? All praise and gratitude are for God (the only Sovereign Lord of the creation). But most people have no knowledge (of the meaning of this truth).¹

If all things are not attributed to the Almighty in creation and administration, an infinite number of deities, all essentially opposite, but simultaneously identical, must be recognized. Due to the interrelation of all things and the essential quality of Divinity, their number would increase in proportion to the number of particles and compounds found in creation.
For example, a deity who creates a honeybee or a grape should be able to rule and influence all elements in the universe, as a honeybee or a grape is a miniature of creation. So there is only room for a Single Necessarily Existent One. If things are attributed to themselves, each minute particle would be a deity – a deity having all the Names and Attributes of God Almighty, for having these Names and Attributes is a requirement of being a deity.
A single fruit grown by many people requires as many tools as does growing a tree with abundant fruit. Similarly, the instruments, machines, and factories needed to equip an army would be the same if only a single soldier were to be equipped. The difference is only qualitative, and the difficulty that arises from being produced by many people will make its production almost impossible. So the universe rejects more than one Creator and Administrator, and its testimony to its Single Creator is more manifest, radiant, clearer, and expressive than its testimony to its own existence. Even if one were to deny the existence of the universe, as the Sophists did, the existence of the One, Who is powerful over all things, cannot be denied.
In short: if innumerably multiple things are not attributed to one source, then, in addition to having to attribute one thing to innumerably multiple things, there would be a multitude of difficulties (as many as there are things) in explaining the matter. So, the apparent, extraordinary ease of creating so many species distributed worldwide must, therefore, come from the Oneness of their Creator.