The Tree of the Knowledge of Good and Evil is in Genesis 2:9 and Genesis 2:17.

From Genesis 2:9, King James Version, "And out of the ground made the LORD God to grow every tree that is pleasant to the sight, and good for food; the tree of life also in the midst of the garden, and the tree of knowledge of good and evil."

From Genesis 2:17, King James Version, "But of the tree of the knowledge of good and evil, thou shalt not eat of it: for in the day that thou eatest thereof thou shalt surely die."

See also