Genesis 2:9-13

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.

And a river went out of Eden to water the garden; and from thence it was parted, and became into four heads.

The name of the first is Pison: that is it which compasseth the whole land of Havilah, where there is gold;

And the gold of that land is good: there is bdellium and the onyx stone.

And the name of the second river is Gihon: the same is it that compasseth the whole land of Ethiopia.