Grimms' fairy tales

There was once on a time a King who had a wife with golden hair, and she was so beautiful that her equal was not to be found on earth. It came to pass that she lay ill, and as she felt that she must soon die, she called the King and said, If thou wishest to marry again after my death, take no one who is not quite as beautiful as I am, and who has not just such golden hair as I have: this thou must promise me. And after the King had promised her this she closed her eyes and ...