"Dear, you should not stay so late, Twilight is not good for maidens;" (143-144)
Lizzie tries to remind Laura why they shouldn't stay out late – the goblins will tempt them. Specifically, though, staying out late isn't good for girls. Apparently eating the goblin fruit is only dangerous for "maidens."
"Lizzie, Lizzie, have you tasted For my sake the fruit forbidden?" (478-479)
In these lines, Laura actually calls the goblin fruit "forbidden." It's the closest Rossetti ever comes to comparing the goblin fruit to the "forbidden fruit" in the Garden of Eden.