John 9:33

If this man were not of God he would be able to do nothing.

John 3:2

he came to him by night, and said to him, Rabbi, we know that thou art come a teacher from God, for none can do these signs that thou doest unless God be with him.

John 9:16

Some of the Pharisees therefore said, This man is not of God, for he does not keep the sabbath. Others said, How can a sinful man perform such signs? And there was a division among them.

Acts 5:38-39

And now I say to you, Withdraw from these men and let them alone, for if this counsel or this work have its origin from men, it will be destroyed;

Treasury of Scripture Knowledge

Summary

If this man were not of God, he could do nothing.

Bible References

Were

John 9:16
Some of the Pharisees therefore said, This man is not of God, for he does not keep the sabbath. Others said, How can a sinful man perform such signs? And there was a division among them.
John 3:2
he came to him by night, and said to him, Rabbi, we know that thou art come a teacher from God, for none can do these signs that thou doest unless God be with him.
Acts 5:38
And now I say to you, Withdraw from these men and let them alone, for if this counsel or this work have its origin from men, it will be destroyed;