Prayer leaf
From Tardis Wiki, the free Doctor Who reference
Prayer leaves were cloth symbols crafted by the people of the Gamma Forests. These were embroidered with the names of one's children in the native tongue of the people of the Gamma Forests, as a sign of belief that child would always come home to them. Lorna Bucket made one for Amy Pond and her daughter, Melody. (TV: A Good Man Goes to War)
