And whosoever among you are sick, and have not faith to be healed, but believe, shall be nourished with all tenderness, with herbs and mild foods. - D&C 42:43
He causeth the grass to grow for the cattle, and herbs for the service of man... -Psalms 104:14
And again, verily I say unto you, all wholesome herbs hath God ordained for the constitution, nature, and use of man -D&C 89:10