Acts 8:36-38 New Matthew Bible (NMB)
36 And as they went on their way, they came to some water, and the chamberlain said, See, here is water. What is to keep me from being baptized? 37 Philip said to him, If you believe with all your heart, you may be. He answered and said, I believe that Jesus Christ is the Son of God.
38 And he commanded the chariot to stand still. And they both went down into the water, both Philip and also the chamberlain, and he baptized him.