Contradiction with John 8:14
It contradicts the claim in John 7:28 because Jesus states that He knows where He came from and where He is going.
John 8:14: Jesus answered and said unto them, Though I bear record of myself, [yet] my record is true: for I know whence I came, and whither I go; but ye cannot tell whence I come, and whither I go.
Contradiction with John 16:28
This verse contradicts John 7:28 by declaring Jesus' origin as being from the Father and His return to the Father.
John 16:28: I came forth from the Father, and am come into the world: again, I leave the world, and go to the Father.
Contradiction with John 14:7
Contradicts John 7:28 because it asserts that knowing Jesus is equivalent to knowing the Father, whereas John 7:28 emphasizes that the people do not know the one who sent Him.
John 14:7: If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him.
Contradiction with John 8:42
This verse contradicts by emphasizing Jesus' divine origin and direct relationship with God as His Father, unlike the questioning language of origin in John 7:28.
John 8:42: Jesus said unto them, If God were your Father, ye would love me: for I proceeded forth and came from God; neither came I of myself, but he sent me.
Contradiction with John 5:36
It contradicts the ambiguity in John 7:28 by highlighting that Jesus’ works bear witness to His divine sending by the Father.
John 5:36: But I have greater witness than [that] of John: for the works which the Father hath given me to finish, the same works that I do, bear witness of me, that the Father hath sent me.