John 7:12-18 ESV
And there was much muttering about him among the people. While some said, “He is a good man,” others said, “No, he is leading the people astray.” Yet for fear of the Jews no one spoke openly of him.
About the middle of the feast Jesus went up into the temple and began teaching. The Jews therefore marveled, saying, “How is it that this man has learning, when he has never studied?” So Jesus answered them, “My teaching is not mine, but his who sent me. If anyone’s will is to do God’s will, he will know whether the teaching is from God or whether I am speaking on my own authority. The one who speaks on his own authority seeks his own glory; but the one who seeks the glory of him who sent him is true, and in him there is no falsehood.
ESV: English Standard Version 2016