Contradiction with Exodus 15:26
This verse suggests that God will not allow diseases if people obey His commands, which contrasts with Paul's acceptance that some companions were left sick in 2 Timothy 4:20.
Exodus 15:26: And said, If thou wilt diligently hearken to the voice of the LORD thy God, and wilt do that which is right in his sight, and wilt give ear to his commandments, and keep all his statutes, I will put none of these diseases upon thee, which I have brought upon the Egyptians: for I [am] the LORD that healeth thee.
Contradiction with James 5:14-15
These verses describe the process of healing the sick through prayer and anointing, contradicting the idea of leaving someone sick as mentioned in 2 Timothy 4:20.
James 5:14-15: Is any sick among you? let him call for the elders of the church; and let them pray over him, anointing him with oil in the name of the Lord:
Contradiction with Mark 16:17-18
These verses say believers will heal the sick by laying hands on them, contrasting with the lack of healing implied in 2 Timothy 4:20.
Mark 16:17-18: And these signs shall follow them that believe; In my name shall they cast out devils; they shall speak with new tongues;
Contradiction with Matthew 9:35
Here, Jesus heals all manner of sickness, contrasting with Paul's companions remaining ill as noted in 2 Timothy 4:20.
Matthew 9:35: And Jesus went about all the cities and villages, teaching in their synagogues, and preaching the gospel of the kingdom, and healing every sickness and every disease among the people.
Contradiction with John 14:12
Jesus states that His followers will do greater works, including healing, which seems to conflict with the acceptance of sickness in 2 Timothy 4:20.
John 14:12: Verily, verily, I say unto you, He that believeth on me, the works that I do shall he do also; and greater [works] than these shall he do; because I go unto my Father.