This Bible contradiction is from the Skeptic's Annotated Bible.
Exodus 4:11 View context
And the LORD said unto him, Who hath made man's mouth? or who maketh the dumb, or deaf, or the seeing, or the blind? have not I the LORD?
John 9:1-3 View context
And as [Jesus] passed by, he saw a man which was blind from [his] birth.
And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind?
Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him.
Mark 9:17 View context
And one of the multitude answered and said, Master, I have brought unto thee my son, which hath a dumb spirit;