John 9:33

If this man were not of God, he could have done nothing."

John 3:2

The same came to Jesus by night, and said unto him, "Rabbi, we know that thou art a teacher which art come from God. For no man could do such miracles as thou doest, except God were with him."

John 9:16

Then said some of the Pharisees, "This man is not of God, because he keepeth not the Sabbath day." Others said, "How can a man that is a sinner do such miracles?" And there was strife among them.

Acts 5:38-39

And now I say unto you: refrain yourselves from these men, let them alone: For if the counsel or this work be of men, it will come to nought:

Treasury of Scripture Knowledge

Summary

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

Bible References

Were

John 9:16
Then said some of the Pharisees, "This man is not of God, because he keepeth not the Sabbath day." Others said, "How can a man that is a sinner do such miracles?" And there was strife among them.
John 3:2
The same came to Jesus by night, and said unto him, "Rabbi, we know that thou art a teacher which art come from God. For no man could do such miracles as thou doest, except God were with him."
Acts 5:38
And now I say unto you: refrain yourselves from these men, let them alone: For if the counsel or this work be of men, it will come to nought: