Genesis 2:8-9, 17

The LORD God planted a garden eastward in Eden, and there He put the man whom He had formed. And out of the ground the LORD God made every tree grow that is pleasant to the sight and good for food. The tree of life was also in the midst of the garden, and the tree of the knowledge of good and evil.

but of the tree of the knowledge of good and evil you shall not eat, for in the day that you eat of it you shall surely die.”