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“se baptism”
Self baptism: "Back in 1606 there was a Christian congregation in England that was pastored by John Smyth. In 1608 this church emigrated to Amsterdam because of religious persecution in England."
"While in Amsterdam, Smyth became convinced that the scriptures require believers' baptism, not infant baptism. Since Smyth had not been baptized in the way he felt was correct, he baptized himself, then baptized the other members of the church he was leading."