In what way does Abdel-Fattah use repetition in order to underscore a fervent wish of Amal's in Chapter 5?

In Chapter 5, during the early morning, Amal tells the reader about the contents of her fajr prayers. She names all sorts of situations about which she prays on this occasion, including peace between the Palestinians and the Israelis, success for Simone's next diet, and personal growth for the resident mean girl, Tia. Only one item in the list is repeated, however, and that is "that Ms. Walsh lets [her] wear [her] hijab" (54). Three times over the course of the list this item appears and tellingly, it is repeated again as the last sentence of the chapter, thereby underscoring its significance in Amal's life and within the narrative.