In 2 Corinthians 1:4, this same comfort is given to us so we can comfort others — verse 5 then specifies the source is through Christ's sufferings.

Second Corinthians 4:10 describes carrying Jesus' death in the body — a specific outworking of sharing abundantly in Christ's sufferings.

Second Corinthians 4:11 repeats the theme: being given over to death for Jesus' sake, so his life appears — directly echoes the suffering-sharing pattern.

In 2 Corinthians 11:23-30, Paul catalogs his many hardships — a detailed inventory of what sharing in Christ's sufferings looks like.

Acts 9:4 reveals that persecuting believers is persecuting Christ himself — the foundation for why our sufferings are Christ's sufferings.

First Corinthians 4:10-13 lists apostles as fools, weak, reviled — embodying the pattern of sharing in Christ's sufferings.

Philippians 3:10 explicitly seeks to 'share his sufferings' and become like him in death — a direct verbal parallel to the shared sufferings here.

Colossians 1:24 speaks of filling up Christ's afflictions for the church — a complementary explanation of how believers share in Christ's sufferings.

2 Thessalonians 2:16 speaks of 'eternal comfort' from God—the same comfort Paul says abounds through Christ's sufferings.

Psalm 94:19 says God's consolations cheer the soul—directly echoing the comfort Paul says comes through Christ.

Isaiah 61:2 promises comfort for mourners—the messianic comfort that Christ brings, which Paul says is realized through His sufferings.

Psalm 71:21 prays for God to comfort again after affliction—similar theme of divine comfort following trouble.