1 Peter 4:6
For for this cause was the gospel preached also to them that are dead, that they might be judged according to men in the flesh, but live according to God in the spirit.
Cross-reference
1 Peter 3:19 describes Christ proclaiming to spirits in prison—the same 'dead' to whom the gospel was preached in 4:6.
In John 5:25, Jesus says the dead will hear his voice and live—parallel to the gospel preached to the dead giving life in the Spirit.
Romans 8:10 states though the body is dead, the Spirit gives life—direct parallel to 'judged in flesh, live in spirit' in 1 Peter 4:6.
Ephesians 2:3-5 depicts being dead in sins and made alive in Christ, directly paralleling the gospel bringing life to the dead here.
Romans 6:10 says Christ died to sin and lives to God, a pattern undergirding believers being judged in flesh to live in spirit.
1 Corinthians 11:32 shows divine discipline aims to spare believers from condemnation, echoing how judgment in the flesh leads to life in the spirit.
2 Corinthians 5:15 states Christ died so we live for Him, echoing the purpose of judgment in the flesh leading to life in the spirit.
Galatians 2:19 has Paul dying to law to live for God, mirroring the pattern of being judged in flesh to live in spirit.