Genesis 2:13

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

Genesis 2:12

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

Genesis 2:11

The name of the first [is] Pison: that [is] it which compasseth the whole land of Havilah, where [there is] gold;
*note:  Josephus identifies Pison as being the Ganges river.