Verses 11 to 17 of John 7. 

The Jewish leaders tried to find him at the festival and kept asking if anyone had seen him. There was a lot of grumbling about him among the crowds. Some argued, “He’s a good man,” but others said, “He’s nothing but a fraud who deceives the people.” But no one had the courage to speak favorably about him in public, for they were afraid of getting in trouble with the Jewish leaders. Then, midway through the festival, Jesus went up to the Temple and began to teach. The people were surprised when they heard him. “How does he know so much when he hasn’t been trained?” they asked. So Jesus told them, “My message is not my own; it comes from God who sent me. Anyone who wants to do the will of God will know whether my teaching is from God or is merely my own.