The Book of Mormon, 3 Nephi 20:22

22 And behold, this people will I establish in this land, unto the fulfilling of the covenant which I made with your father Jacob; and it shall be a New Jerusalem. And the powers of heaven shall be in the midst of this people; yea, even I will be in the midst of you.

The Doctrine and Covenants, Section 38:7-8

7 But behold, verily, verily, I say unto you that mine eyes are upon you. I am in your midst and ye cannot see me;

8 But the day soon cometh that ye shall see me, and know that I am; for the veil of darkness shall soon be rent, and he that is not purified shall not abide the day.

Lee, Harold B. (1971, November). The Way to Eternal Life. Ensign.

But there was a brighter day that was promised, when these judgments would descend as we see them now in great evidence: “And also the Lord shall have power over his saints, and shall reign in their midst, and shall come down in judgment upon Idumea, or the world.” (D&C 1:36) How does he reign in our midst? How shall he have power over his saints? If you had been in the meeting of the priesthood last night, you would have seen the great power that was in evidence there, where there were two thousand holders of the priesthood, the power of God by which he works through men to the accomplishment of his purposes. He is reigning in our midst through them.

Journal of Discourses, Orson Pratt 15:41

Let me make a few remarks here in relation to the difference between Zion and Jerusalem. Zion will be favored with the presence of the Lord before the Jews are permitted to behold him. The Lord will come to the Temple of Zion before he comes to the Temple at Jerusalem. Before he comes in the clouds of heaven with power and great glory, he will manifest himself in the city and Temple of Zion; or in other words all the pure in heart who are permitted in those days to enter into the Lord’s Temple in Zion, which will be built on this continent, the Lord will reveal his face onto them, they will see him and he will dwell in the midst of Zion.