Condition: Snakebites
In Mark 16:15-18, Jesus says in effect that serpents will not harm believers, and that this will be a sign to follow believers as they preach the gospel to everyone.
In Acts 28:3-6 there is a confirmation of this when Paul is bitten by a deadly snake and suffers no ill effects.
In Numbers 21:5-9, a symbol of the crucified Christ is raised up. Anyone bitten by a deadly snake can look at that symbol of Christ and live. If you could be healed of a snakebite by looking at a symbol of Christ, surely Christ himself is willing to heal you of snakebites.
Although it is more likely symbolic, Luke 10:17-20 does tell us that Jesus’ disciples will tread on serpents and scorpions.
No one has the right to tempt God by deliberately handling snakes, but if a poisonous snake bites you, Jesus promises you immunity as a believer.