Contradiction with James 1:6
This verse suggests praying without doubting, while the leper in Matthew 8:2 shows doubt by saying "if thou wilt."
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 Matthew 21:21
This verse states that with faith and no doubt, anything can be done, contradicting the leper’s uncertainty in Matthew 8:2.
Matthew 21:21: Jesus answered and said unto them, Verily I say unto you, If ye have faith, and doubt not, ye shall not only do this [which is done] to the fig tree, but also if ye shall say unto this mountain, Be thou removed, and be thou cast into the sea; it shall be done.
Contradiction with John 14:13
This verse says anything asked in Jesus' name will be done, contrasting the leper’s conditional request in Matthew 8:2.
John 14:13: And whatsoever ye shall ask in my name, that will I do, that the Father may be glorified in the Son.
Contradiction with Mark 11:24
This verse emphasizes belief in receiving what you ask for, whereas the leper in Matthew 8:2 seems unsure.
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].
Contradiction with Hebrews 11:6
This verse states that one must believe in God’s ability and willingness to reward, which contrasts with the leper’s uncertainty in Matthew 8:2.
Hebrews 11:6: But without faith [it is] impossible to please [him]: for he that cometh to God must believe that he is, and [that] he is a rewarder of them that diligently seek him.