They worship alongside God things that can neither harm nor benefit them, and say, ‘These are our intercessors with God.’ Say, ‘Do you think you can tell God about something He knows not to exist in the heavens or earth? Glory be to Him! He is far above the partner-gods they associate with Him!
Quran 10:18
[Prophet], set your face towards religion as a man of pure faith. Do not be one of those who join partners with God; Do not pray to any other [god] that can neither benefit nor harm you: if you do, you will be one of the evildoers. If God inflicts harm on you, no one can remove it but Him, and if He intends good for you, no one can turn His bounty away; He grants His bounty to any of His servants He will. He is the Most Forgiving, the Most Merciful. Say, ‘People, the Truth has come to you from your Lord. Whoever follows the right path follows it for his own good, and whoever strays does so to his own loss: I am not your guardian.’
Quran 10:105-108
Say [Prophet], ‘Consider those you pray to other than God: show me which part of the earth they created or which share of the heavens they own; bring me a previous scripture or some vestige of divine knowledge––if what you say is true.’ Who could be more wrong than a person who calls on those other than God, those who will not answer him till the Day of Resurrection, those who are unaware of his prayers, those who, when all mankind is gathered, will become his enemies and disown his worship?
Quran 46:4-6