Acts 8:38

“This same Philip, who had baptized people, and the Holy Spirit had not come upon them until the apostles had come along and laid their hands on them, baptized the eunuch of queen Candace who had been worshiping in Jerusalem, and on his way back from there he was reading the prophet Isaiah in his chariot and not understanding it. Philip was prompted to approach the chariot, and he explained the reading, insinuated the faith, preached Christ. The eunuch believed in Christ and said, when they came to some water, "Look, here is water; who is to prevent me being baptized? Philip said to him, "Do you believe in Jesus Christ?" He answered, "I believe that Jesus Christ is the Son of God." And immediately he went down with him into the water. Once the mystery and sacrament of baptism had been carried out, since there was no expectation of the apostles coming as on the previous occasion, so that no one should think the gift of the Holy Spirit was at the disposal of mortals, the Holy Spirit came immediately.”