1 Timothy 1:19-20:

Holding faith, and a good conscience; which some having put away concerning faith have made shipwreck:
Of whom is Hymenaeus and Alexander; whom I have delivered unto Satan, that they may learn not to blaspheme.

See also:

Temporary Cancelation of Sin’s Consequences Through Intercession
Sickness as Chastening and Judgment in the New Testament
Is It Ever Right to NOT Minister Healing to Someone?
Am I Sick Because I Touched God’s Anointed?
Objection: Healing Cannot Be in the Atonement Because Healing Can Be Lost, but Salvation Cannot Be Lost