17 For, behold, I create new heavens and a new earth: and the former shall not be remembered, nor come into mind.
The Holy Bible, 2 Peter 3:10-13
10 But the day of the Lord will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.
11 Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness,
12 Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat?
13 Nevertheless we, according to his promise, look for new heavens and a new earth, wherein dwelleth righteousness.
The Doctrine and Covenants, Section 63:20-21
20 Nevertheless, he that endureth in faith and doeth my will, the same shall overcome, and shall receive an inheritance upon the earth when the day of transfiguration shall come;
21 When the earth shall be transfigured, even according to the pattern which was shown unto mine apostles upon the mount; of which account the fulness ye have not yet received.
The Doctrine and Covenants, Section 77:12-13
12 Q. What are we to understand by the sounding of the trumpets, mentioned in the 8th chapter of Revelation? A. We are to understand that as God made the world in six days, and on the seventh day he finished his work, and sanctified it, and also formed man out of the dust of the earth, even so, in the beginning of the seventh thousand years will the Lord God sanctify the earth, and complete the salvation of man, and judge all things, and shall redeem all things, except that which he hath not put into his power, when he shall have sealed all things, unto the end of all things; and the sounding of the trumpets of the seven angels are the preparing and finishing of his work, in the beginning of the seventh thousand years–the preparing of the way before the time of his coming.
13 Q. When are the things to be accomplished, which are written in the 9th chapter of Revelation? A. They are to be accomplished after the opening of the seventh seal, before the coming of Christ.