Acts 8:35-36, 38

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.