When Jesus came to earth for his ministry among the Jews, he said the following:
John 10:15-16
15 As the Father knoweth me, even so know I the Father: and I lay down my life for the sheep.
16 And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd.
Here Jesus tells us that other than the sheep (the Jews) to which he came, that he had other sheep which were not of that fold. He said that that he would go to them and that they would hear his voice and hear his gospel so that there would be one fold of true believers. Where did Jesus go to other sheep who were not of the fold of those in Judea? We believe that he went among those who were on the American continent who were led away approximately 600 B.C. from Judea and brought to the American continent. The Book of Mormon testifies that Jesus did indeed visit these people and established his church among them and preached his gospel.
Ezekiel 37:15-19
15 The word of the Lord came again unto me, saying,
16 Moreover, thou son of man, take thee one stick, and write upon it, For Judah, and for the children of Israel his companions: then take another stick, and write upon it, For Joseph, the stick of Ephraim, and for all the house of Israel his companions:
17 And join them one to another into one stick; and they shall become one in thine hand.
18 And when the children of thy people shall speak unto thee, saying, Wilt thou not shew us what thou meanest by these?
19 Say unto them, Thus saith the Lord God; Behold, I will take the stick of Joseph, which is in the hand of Ephraim, and the tribes of Israel his fellows, and will put them with him, even with the stick of Judah, and make them one stick, and they shall be one in mine hand.
We believe that the interpretation of these verses in Ezekiel 37 is that the stick of Judah is the Bible and that the stick of Joseph is the Book of Mormon. The Book of Mormon is a history of the the posterity of Joseph who were led away from Judea to the Americas. The prophet Joseph Smith, whom we believe is a direct descendant of Ephraim, was called to bring about the book of Mormon and fulfill the above prophesy of Ezekiel 37. Today this prophesy has been fulfilled as our members and missionaries carry the Bible and the Book of Mormon together in their hands.
Book of Mormon Answers