Contradiction with Proverbs 15:3
Proverbs 15:3 states that the eyes of the Lord are in every place, which contrasts with John 13:28 where the disciples did not understand what Jesus meant.
Proverbs 15:3: The eyes of the LORD [are] in every place, beholding the evil and the good.
Contradiction with Matthew 10:26
Matthew 10:26 asserts that nothing secret will remain hidden, conflicting with the disciples' ignorance in John 13:28.
Matthew 10:26: Fear them not therefore: for there is nothing covered, that shall not be revealed; and hid, that shall not be known.
Contradiction with Mark 4:22
Mark 4:22 suggests that nothing is hidden except to be revealed, which opposes the idea in John 13:28 of the disciples not knowing Jesus' meaning.
Mark 4:22: For there is nothing hid, which shall not be manifested; neither was any thing kept secret, but that it should come abroad.
Contradiction with 1 Corinthians 2:10
1 Corinthians 2:10 says God has revealed things to us through the Spirit, contradicting John 13:28 where the disciples do not perceive Jesus' intentions.
1 Corinthians 2:10: But God hath revealed [them] unto us by his Spirit: for the Spirit searcheth all things, yea, the deep things of God.