The Holy Bible, Ezekiel 47:1-10
Waters issue from the house of the Lord and heal the Dead Sea—The Lord shows the borders of the land.
18 And it shall come to pass in that day, that the mountains shall drop down new wine, and the hills shall flow with milk, and all the rivers of Judah shall flow with waters, and a fountain shall come forth of the house of the Lord, and shall water the valley of Shittim.
The Holy Bible, Zechariah 14:8
8 And it shall be in that day, that living waters shall go out from Jerusalem; half of them toward the former sea, and half of them toward the hinder sea: in summer and in winter shall it be.
The Holy Bible, Revelation 22:1-2
1 And he shewed me a pure river of water of life, clear as crystal, proceeding out of the throne of God and of the Lamb.
2 In the midst of the street of it, and on either side of the river, was there the tree of life, which bare twelve manner of fruits, and yielded her fruit every month: and the leaves of the tree were for the healing of the nations.
History of the Church, Joseph Smith 5:337
Judah must return, Jerusalem must be rebuilt, and the temple, and water come out from under the temple, and the waters of the Dead Sea be healed. It will take some time to rebuild the walls of the city and the temple, &c.; and all this must be done before the Son of Man will make His appearance.
Journal of Discourses, Orson Pratt 18:7
They have looked upon him whom their fathers pierced, they behold the wounds, they are now convinced that they and their fathers have been in error some eighteen hundred years, and they repent in dust and ashes. The next step for them will be baptism for the remission of their sins. They look upon him whom their fathers pierced and they mourn for him as one who mourns for his only son, and, as Zechariah says, they are in bitterness for him. But repentance alone would not be sufficient, they must obey the ordinances of the Gospel; hence there will be a fountain opened at that time on purpose for baptism. Where will it be opened? On the east side of the Temple. A stream will break out from under the threshold of the Temple, says the Prophet, and it will run eastward, and will probably pass directly through the deep valley made by the parting of the Mount of Olives. It will run eastward, and as you go down from the Temple a few thousand cubits it increases so rapidly that it becomes a great river that cannot be forded. This is the fountain that Zechariah says is open to the inhabitants of Jerusalem and to the house of David for sin and uncleanness. “How is it that” says one? “Water for sin and uncleanness?” Why yes, baptism for the remission of sins. Then the Jews will receive the Gospel and they will be cleansed from all their sins by being baptized in water for their remission. Then will be fulfilled the words of the Prophet Isaiah, when speaking of Jerusalem–”For henceforth there shall no more come into thee the uncircumcised and the unclean.”… And this water which breaks out from the threshold of the Temple, will not only run eastward but westward also, and there will be a great change in the land there, certain portions rising up, others lowered, rough places made smooth and mountains cast down; and half the waters of this spring which will burst forth, will go towards the former sea and half to the other sea; in other words half towards the Dead Sea and half toward the Mediterranean.