The Bible shows how faith brings healing. Hebrews 11:3–11 specifically refers to the faith of individuals whose experiences are told in the Old Testament. There was the story of siblings Cain and Abel, where Abel’s faith inspired him to make a “more excellent” sacrifice to God than Cain.
And Noah, obedient to God’s directives, expressed faith when building his ark despite widespread disbelief, which ultimately saved his household and much more.
Later on, Abraham, though ignorant of the destination he felt inspired by God to travel to, had faith to proceed regardless, and he and his heirs Isaac and Jacob were led to a “land of promise.”