Baptism was normally performed by immersion or with the neophyte kneeling in the water, and then having water poured over the head. The Didache or Teaching of the Twelve Apostles, a document of uncertain date, prefers that it be done in “living”—that is, running—water. But where water was scarce it could be administered by pouring water three times over the head, in the name of the Father, the Son, and the Holy Spirit.

