1 Nephi 12
Nephi writes of his vision -
"...And a great and a terrible gulf divideth them; yea, even the word of the justice of the Eternal God, and the Messiah who is the Lamb of God, of whom the Holy Ghost beareth record, from the beginning of the world until this time, and from this time henceforth and forever." (1 Nephi 12:18)
The justice of God is forever. President Kimball wrote -
"After a person has been assigned to his place in the kingdom, either in the telestial, the terrestrial, or the celestial, or to his exaltation, he will never advance from his assigned glory to another glory” (Spencer W. Kimball, The Miracle of Forgiveness, pp. 243–44).