Alma 15

One of the promises of the Book of Mormon is that if you are faithful, you will "prosper in the land".  We read of Amulek -

"...having forsaken all his gold, and silver, and his precious things, which were in the land of Ammonihah, for the word of God, he being rejected by those who were once his friends and also by his father and his kindred;
17 Therefore, after Alma having established the church at Sidom, seeing a great check, yea, seeing that the people were checked as to the pride of their hearts, and began to humble themselves before God, and began to assemble themselves together at their sanctuaries to worship God before the altar, watching and praying continually, that they might be delivered from Satan, and from death, and from destruction—
18 Now as I said, Alma having seen all these things, therefore he took Amulek and came over to the land of Zarahemla, and took him to his own house, and did administer unto him in his tribulations, and strengthened him in the Lord."  (Alma 15:16–18)

Obviously, when the Lord promises that we will prosper in the land, it is from an eternal perspective.