Genesis 2:9

Every tree] The garden was planted with trees, like a king's pleasure park. The trees are specially mentioned, partly because they were to provide man's food, and partly because attention is directed to two of them for a particular reason. As life was to be sustained by them, so immortality was to be received through the fruit of the tree of life, and knowledge of good and evil with death in the end were the possible consequences of eating of the forbidden tree. The garden was divinely planted, and the trees bad miraculous powers of good and evil. The tree of life] The Egyptians believed that in the blissful fields of Alu in the other world grew the tree of life, which the stars gave to the departed that they might live for ever; cp. also Revelation 22:2.

10-14. There are many theories regarding these rivers. Perhaps the most likely is that the ancients, with their very limited notions of geography, regarded the four great rivers known to them, Euphrates, Tigris, Indus (Pishon) and Nile (Gihon), as having a common source in some large lake in Eden. Cush will then be Ethiopia. It is possible, however, that the main river stands for the Persian Gulf, which was anciently called 'The Salt River,' and the four heads were four streams connected with it, viz. (1) the Euphrates; (2) the Hiddekel, which the Persians called the Tigra, and Greeks the Tigris; (3) the Gihon, which is said to 'compass' the land of Cush, the country of the Kashshu in W. Elam, and which may therefore be the Kerkha, which once ran with the Euphrates and Tigris into the Persian Gulf; and (4) the Pishon, which has not been identified. Havilah] the sandy region of N. Arabia, and thus not far from the other localities. Bdellium] an odoriferous transparent gum. Onyx] RM 'beryl.' Genesis 2:10 are regarded by many as a later addition to the narrative.