[jer33 3]

Paul's mention of "one baptism" in Ephesians 4 is clearly the baptism that puts us into the "one body", which is the baptism administered to the people in Acts 2:38-41.

How do you know that he is referencing Acts 2:38-41?

[jkl1122]

Because the baptism Acts 2 put those who were baptized into the body, which is exactly what the baptism in Ephesians did.