Who told Dorothy to say there's no place like home?

In "The Wizard of Oz," Glinda the Good Witch tells Dorothy to say, "There's no place like home" as a way for her to return to Kansas. This phrase serves as a magical incantation that helps Dorothy realize the importance of her home and the love she has for her family. It is a pivotal moment that emphasizes the theme of appreciating one's roots and the comfort of home.