In which epistle does the apostle Peter remind believers that they are part of a "chosen race, a royal priesthood, a holy nation" while facing persecution?

The correct answer is 1 Peter. In the epistle of 1 Peter, the apostle Peter reminds believers that they are part of a "chosen race, a royal priesthood, a holy nation" while facing persecution.
Peter wrote this letter to encourage and strengthen the believers who were facing difficulties and persecution for their faith. He reminded them that they were part of a chosen race, meaning that they were chosen by God to be His own special people.
He also described them as a royal priesthood, signifying their close relationship with God and their role in representing Him to the world. In the Old Testament, only the priests had access to God, but now, through Jesus Christ, all believers have direct access to God and are called to serve Him.
Peter further emphasized that they were a holy nation, indicating that they were set apart for God's purposes and called to live lives that reflect His holiness. Despite the challenges they were facing, Peter encouraged the believers to remember their identity as God's chosen people and to hold on to their faith.
Through this reminder, Peter sought to instill hope, strength, and perseverance in the hearts of the believers, reminding them that they were not alone in their struggles and that they had a significant purpose and identity in Christ.