Ezekiel 47:1-12:

Afterward he brought me again unto the door of the house; and behold, waters issued out from under the threshold of the house eastward: for the forefront of the house stood toward the east, and the waters came down from under from the right side of the house, at the south side of the altar.
Then brought he me out of the way of the gate northward, and led me about the way without unto the utter gate by the way that looketh eastward; and behold, there ran out waters on the right side.
And when the man that had the line in his hand went forth eastward, he measured a thousand cubits, and he brought me through the waters; the waters were to the ankles.
And again he measured a thousand, and brought me through the waters; the waters were to the knees.  Again he measured a thousand, and brought me through; the waters were to the loins.
Afterward he measured a thousand; and it was a river that I could not pass over: for the waters were risen, waters to swim in, a river that could not be passed over.
And he said unto me, Son of man, hast thou seen this? Then he brought me, and caused me to return to the brink of the river.
Now when I had returned, behold, at the bank of the river were very many trees on the one side and on the other.
Then said he unto me, These waters issue out toward the east country, and go down into the desert, and go into the sea: which being brought forth into the sea, the waters shall be healed.
And it shall come to pass, that every living thing that liveth, which moveth, whithersoever the rivers shall come, shall live: and there shall be a very great multitude of fish, because these waters shall come hither: for they shall be healed, and every thing shall live whither the river cometh.
And it shall come to pass, that the fishers shall stand upon it from En-gedi even unto En-eglaim; they shall be a place to spread forth nets; their fish shall be according to their kinds, as the fish of the great sea, exceeding many.
But the miry places thereof and the marishes thereof shall not healed; they shall be given to salt.
And by the river upon the bank thereof, on this side and on that side, shall grow all trees for meat, whose leaf shall not fade, neither shall the fruit thereof be consumed: it shall bring forth new fruit according to his months, because their waters they issued out of the sanctuary: and the fruit thereof shall be for meat, and the leaf thereof for medicine.

Notes on Ezekiel 47:1-12:

You could say a lot more about this passage, but I will restrict my comments to the healing part.  The river flowed from the throne of God and it brought healing to everything it touched.  This is yet another illustration that healing comes from God.  In this case, healing of human bodies is implied because the trees that drink the water that flows from God’s sanctuary produce leaves for medicine.  The water from God definitely does not produce sickness, kill or destroy anything.  Instead, it heals that which is sick.

This river has marvelous healing and quickening powers.  If God were the source of sickness for His followers, we would read instead that the river from His sanctuary killed off all the fish and provided water to trees of sickening, whose fruit is poisonous and whose leaves give you cancer.

Where the presence of God is, healing is.