[deport]

It came from the Greek baptisma or baptismos, which meant to dip or to immerse. When John the Baptist started calling for people to repent and be baptized, there was no confusion about the meaning. Anyone who went to John the Baptist was literally immersed into water, and that was baptism.

https://hankeringforhistory.com/the-history-of-baptism/#:~:text=It%20came%20from%20the%20Greek,water%2C%20and%20that%20was%20baptism.

[Elsie]

When John the Baptist started calling for people to repent and be baptized, ...

Where in the Bible is the first instance of baptism mentioned?