Romans 5:2 says 'this grace in which we stand' — a direct parallel to Peter's 'stand firm in the true grace'.

2 Corinthians 1:19 mentions Silvanus as a co-worker of Paul, confirming his identity as the faithful brother mentioned here.

In 1 Thessalonians 1:1, Silas (Silvanus) is named co-sender with Paul, confirming his apostolic coworker role as in 1 Peter.

In 2 Thessalonians 1:1, Silas appears again as co-sender with Paul, reinforcing his trusted ministry with Peter.

Acts 13:43 contains the exact phrase 'continue in the grace of God'—a direct parallel to Peter's exhortation to stand fast in grace.

Acts 15:22 introduces Silas as a leader—the same Silas through whom Peter writes this letter, linking the two.

Acts 15:32 describes Silas encouraging and strengthening believers—the same Silas who delivers Peter's encouraging letter.

Colossians 1:6 speaks of understanding 'God's grace in all its truth' — nearly identical phrasing to Peter's 'true grace of God'.

Galatians 1:8 warns against a false gospel, reinforcing the need to hold to the true grace Peter affirms.

Galatians 1:9 repeats the warning, underscoring the importance of standing in the true grace as urged in 1 Peter.

2 Peter 1:12 echoes the same pastoral concern: reminding believers to stand firm in the truth they have received.

2 Peter 2:15 describes those who stray, contrasting with Peter's call to stand firm in grace.

In Ephesians 3:3, Paul says he wrote 'briefly'—same epistolary phrase Peter uses in 1 Peter 5:12.

In Hebrews 13:22, the author says 'written to you quite briefly'—echoes Peter's 'written briefly' in 1 Peter 5:12.