‘You need what’s wrapped in them, it’s the Felix Felicis. Share it between yourselves and Ginny too. Say goodbye to her from me. I’d better go, Dumbledore’s waiting -’
[and then later]
… It seemed hours and hours ago that he had met Professor Trelawney, that he had given Ron and Hermione Felix Felicis… . He suddenly wished he had said a better good-bye to them … and he hadn’t seen Ginny at all…"
Harry Potter and the Half-Blood Prince