In 1 Corinthians 15:11, Paul affirms all apostles preach the same gospel you believed — reinforcing the foundation of the faith held here.

In 1 Corinthians 15:12, the denial of resurrection is the specific error that makes belief vain — a direct contextual link.

1 Corinthians 15:14 declares faith vain if Christ is not raised — linking to the 'believed in vain' warning in v2 within the same argument.

1 Corinthians 15:10 uses the same 'in vain' language — Paul's labor was not in vain, contrasting with the warning of believing in vain here.

1 Corinthians 15:17 states that without the resurrection, faith is futile — directly paralleling the possibility of believing in vain here.

1 Corinthians 1:18 contrasts those perishing and being saved — the same saving power of the cross that requires holding fast here.

1 Corinthians 1:21 explains that God saves through the preached message — the same 'word preached' by which believers are saved here.

1 Corinthians 11:2 commends maintaining delivered traditions — echoing the condition of holding fast to the gospel here.

1 Corinthians 16:13 exhorts standing firm in the faith — a call to the same perseverance required to not have believed in vain here.

2 Thessalonians 2:15 urges holding fast to traditions — directly echoing the condition in 1 Cor 15:2 that salvation requires persevering in the gospel.

In 2 Corinthians 6:1, Paul urges not to receive grace 'in vain' — the same phrase as 1 Corinthians 15:2's warning against empty faith.

In 2 Timothy 1:9, salvation is by God's purpose and grace, not works — contrasting the conditional warning here.

Hebrews 2:1 warns against drifting from what was heard — mirroring the 'hold fast' warning of 1 Cor 15:2.

Hebrews 3:6 makes being God's house conditional on holding fast — same conditional perseverance as 1 Cor 15:2.

Hebrews 3:14 states we share in Christ only if we hold our confidence firm to the end — identical condition to 1 Cor 15:2.

Hebrews 4:14 exhorts holding fast our confession — reinforcing the need to persevere in the faith from 1 Cor 15:2.

Hebrews 10:23 calls us to hold fast the confession without wavering — same exhortation as the condition in 1 Cor 15:2.

In James 2:14, faith without works is questioned as saving — aligning with Paul's condition that holding fast proves genuine faith in 1 Corinthians 15:2.

In James 2:17, faith without works is dead — reinforcing the same idea as Paul's 'unless you believed in vain' in 1 Corinthians 15:2.

In James 2:26, faith without works is dead like a body without spirit — paralleling Paul's insistence on persevering faith in 1 Corinthians 15:2.

In Colossians 1:23, Paul conditions salvation on continuing in faith — a direct thematic parallel to the condition here.

In Ephesians 2:8, salvation is a gift through faith, contrasting the conditional 'if you hold firmly' here.

In Galatians 3:4, Paul asks if their experience was 'in vain' — echoing 1 Corinthians 15:2's concern that faith might prove pointless.

Psalm 106:13 shows Israel quickly forgetting God's works — illustrating the failure to hold fast, which 1 Cor 15:2 warns against.

Romans 1:16 calls the gospel the power of God for salvation — the same gospel by which believers are being saved here.

In Acts 8:13, Simon 'believed' but later proved false — a warning example of the 'believed in vain' Paul mentions in 1 Corinthians 15:2.

In John 8:31, Jesus conditions true discipleship on abiding in His word — the same persevering faith Paul requires for salvation in 1 Corinthians 15:2.

Luke 8:13 describes those who believe temporarily and fall away — directly illustrating the 'believed in vain' concept from 1 Cor 15:2.

In Romans 11:22, Paul warns to continue in God's kindness or be cut off — the same conditional perseverance required in 1 Corinthians 15:2.

Galatians 2:21 warns against making Christ's death in vain — analogous to the danger of believing in vain here.