Hosanna (Hoshea na) – Hebrew for “Please save” or “save now.”
The Hebrew name for Jesus is: Yeshua, which means “He who saves.” (Matthew 1:19-21)
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3 Nephi 11 – The Resurrected Yeshua visits the Ancient American city Bountiful.
 Behold, I am Jesus Christ (Yeshua HaMashiach), whom the prophets testified shall come into the world.
 And behold, I am the light and the life of the world; and I have drunk out of that bitter cup which the Father hath given me, and have glorified the Father in taking upon me the sins of the world, in the which I have suffered the will of the Father in all things from the beginning.
 And it came to pass that when Jesus had spoken these words the whole multitude fell to the earth; for they remembered that it had been prophesied among them that Christ should show himself unto them after his ascension into heaven.
 And it came to pass that the Lord spake unto them saying:
 Arise and come forth unto me, that ye may thrust your hands into my side, and also that ye may feel the prints of the nails in my hands and in my feet, that ye may know that I am the God of Israel, and the God of the whole earth, and have been slain for the sins of the world.
 And it came to pass that the multitude went forth, and thrust their hands into his side, and did feel the prints of the nails in his hands and in his feet; and this they did do, going forth one by one until they had all gone forth, and did see with their eyes and did feel with their hands, and did know of a surety and did bear record, that it was he, of whom it was written by the prophets, that should come.
 And when they had all gone forth and had witnessed for themselves, they did cry out with one accord, saying:
 Hosanna! Blessed be the name of the Most High God! And they did fall down at the feet of Jesus, and did worship him.
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1 Nephi 11:6
And when I had spoken these words, the Spirit cried with a loud voice, saying: Hosanna to the Lord, the most high God; for he is God over all the earth, yea, even above all. And blessed art thou, Nephi, because thou believest in the Son of the most high God; wherefore, thou shalt behold the things which thou hast desired.
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See also: 3 Nephi 4:32
– Tom Irvine