Genesis 2:8-9, 17

Now the LORD God had planted a garden in the east, in Eden; and there he put the man he had formed. The LORD God made all kinds of trees grow out of the ground—trees that were pleasing to the eye and good for food. In the middle of the garden were the tree of life and the tree of the knowledge of good and evil.

but you must not eat from the tree of the knowledge of good and evil, for when you eat from it you will certainly die.”