Contradiction with Matthew 6:24
This verse emphasizes serving only one master and not seeking both God and material gain, which contrasts with John 6:24, where people seek Jesus for personal benefit.
Matthew 6:24: No man can serve two masters: for either he will hate the one, and love the other; or else he will hold to the one, and despise the other. Ye cannot serve God and mammon.
Contradiction with John 6:26
While John 6:24 describes people seeking Jesus, John 6:26 indicates they are doing so for wrong reasons, focusing on material satisfaction.
John 6:26: Jesus answered them and said, Verily, verily, I say unto you, Ye seek me, not because ye saw the miracles, but because ye did eat of the loaves, and were filled.