There was a man who had been blind from birth. Jesus had the following conversation with him after giving the man sight:

Jesus heard that they had cast him out; and when He had found him, He said to him, "Do you believe in the Son of God?" He answered and said, "Who is He, Lord, that I may believe in Him?" And Jesus said to him, "You have both seen Him and it is He who is talking with you." Then he said, "Lord, I believe!" And he worshipped Him. (John 9:35-38)

Here the man asks Jesus a direct question regarding the identity of the Son of God. And Jesus tells the man that he, Jesus, is the Son of God.