1 Timothy 5:23:

Drink no longer water, but use a little wine for thy stomach’s sake and thine often infirmities.

See also:

Should We Pray to Determine the Real Root Cause of an Illness?
Should Christians Get Flu Shots?
Objection: God Wouldn’t Heal Paul’s Thorn in the Flesh
Objection: Paul Told Timothy to Drink Wine Instead of Believing God for Healing
Condition: Diarrhea
Condition: Stomach Disorders
Mistake: Violating Natural Laws
Notes on Acts 27:33-34