1 Corinthians 1:16
And I baptized also the household of Stephanas: besides, I know not whether I baptized any other.
Cross-reference
1 Corinthians 16:15
Historical context
1 Corinthians 16:15 identifies Stephanas' household as first converts in Achaia — the same household Paul baptized and mentions here.
Acts 16:15
Parallel
Acts 16:15 records Paul baptizing Lydia's household — another example of household baptism, similar to Stephanas' household here.
Acts 16:33
Parallel
Acts 16:33 records Paul baptizing the Philippian jailer and his household — parallel to the household baptism of Stephanas mentioned here.