Had there been more than one god, the universe system and harmony would have been disrupted.
This argument is in the Quran 21: 22, which means:
{22. If there were in both [the heavens and the earth i ], other gods besides God, then both would have been disordered! j
But highly exalted be God, the Lord of the Throne: above what k they attribute [to Him.]}
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22 i i.e. the planets including the earth.
22 j Because of the opposition and contradiction of the opinions of the gods, and what each of them wants to do for his creatures; as will the people be in disorder, if they have many kings.
22 k Associates, sons and daughters.
http://quran-ayat.com/pret/21.htm#a21_22
quran-ayat.com/pret/21.htm#a21_22
This argument is in the Quran 21: 22, which means:
{22. If there were in both [the heavens and the earth i ], other gods besides God, then both would have been disordered! j
But highly exalted be God, the Lord of the Throne: above what k they attribute [to Him.]}
............................................................
22 i i.e. the planets including the earth.
22 j Because of the opposition and contradiction of the opinions of the gods, and what each of them wants to do for his creatures; as will the people be in disorder, if they have many kings.
22 k Associates, sons and daughters.
http://quran-ayat.com/pret/21.htm#a21_22
quran-ayat.com/pret/21.htm#a21_22