Gevurot 8:36-38

Orthodox Jewish Bible

³⁶ And as they were going along the derech, they came upon some mayim and the eunuch says, "Hinei, mayim! What prevents me from being given Moshiach’s tevilah of teshuva in the mikveh mayim?"

³⁷ [And Philippos said, “If you have emunah b’chol levavcha, it is mutar. And he answered, saying, Ani ma’amin ki Rebbe Melech HaMoshiach Yehoshua Ben HaElohim hu.]

³⁸ And he commanded the chariot to stop and both went down into the mikveh mayim, both Philippos and the eunuch, and Philippos gave him Moshiach’s tevilah of teshuva in the mikveh mayim.