“Then cried Jesus in the temple as he taught, saying, Ye both know me, and ye know whence I am: and I am not come of myself, but he that sent me is true, whom ye know not.”
King James Version (KJV)
7:28 Then cried Jesus - With a loud and earnest voice. Do ye both know me, and know whence I am ? - Ye do indeed know whence I am as a man. But ye know not my Divine nature, nor that I am sent from God.
Joh 7:28 Ye know whence I am. This is a reply to their assertion that they did. If they really did they would know that he came from God. They did not even know God, or they would know him whom God sent.