Acts 8:34-36, 38

And the eunuch answered Philip, and said, I pray thee, of whom speaketh the prophet this? of himself, or of some other man? Then Philip opened his mouth, and began at the same scripture, and preached unto him Jesus. And as they went on their way, they came unto a certain water: and the eunuch said, See, here is water; what doth hinder me to be baptized?

And he commanded the chariot to stand still: and they went down both into the water, both Philip and the eunuch; and he baptized him.