First meeting

"Hurry up!" their mother said, and the three boys clambered onto the train. They leaned out of the window for her to kiss them good-bye, and their younger sister began to cry.
"Don't, Ginny, we'll send you loads of owls."
"We'll send you a Hogwarts toilet seat."
"George!"
"Only joking, Mom."
The train began to move. Harry saw the boys' mother waving and their sister, half laughing, half crying, running to keep up with the train until it gathered too much speed, then she fell back and waved.
Harry watched the girl and her mother disappear as the train rounded the corner.
***
Harry Potter and the Philosopher Stone Chapter Six: The Journey from Platform Nine and Three-Quarters