Contradiction with James 1:6
This verse emphasizes unwavering faith without doubting, whereas Matthew 21:20 shows the disciples' astonishment and questioning, indicating a lack of such unwavering faith.
James 1:6: But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.
Contradiction with John 20:29
Jesus commends those who believe without seeing, while in Matthew 21:20, the disciples are amazed by what they see, suggesting they needed to see to believe.
John 20:29: Jesus saith unto him, Thomas, because thou hast seen me, thou hast believed: blessed [are] they that have not seen, and [yet] have believed.
Contradiction with Mark 11:24
This verse highlights having faith and not doubting in prayer, while Matthew 21:20 reflects the disciples' surprise, which implies doubt or unexpectedness from their end.
Mark 11:24: Therefore I say unto you, What things soever ye desire, when ye pray, believe that ye receive [them], and ye shall have [them].