Acts 8:28-31

and he was returning, and sitting in his chariot he was reading [the scroll of] the prophet Isaiah. Then the [Holy] Spirit said to Philip, “Go up and join this chariot.” Philip ran up and heard the man reading the prophet Isaiah, and asked, “Do you understand what you are reading?” And he said, “Well, how could I [understand] unless someone guides me [correctly]?” And he invited Philip to come up and sit with him.