Marrying Someone That Is Not Yet Born

Ibrahim bin Maisarah reported from his maternal aunt who reported on the authority of a woman called Mussaddaqah (a truthful woman). She said “In pre Islamic days, when my father participated in a battle the feet of the people burnt due to intense heat. Thereupon a man said “Who gives me his shoes, I shall marry him to my first daughter born to me. My father took off his shoes and there them before him. A girl was thereafter born to him and came of age.” The narrator then mentioned a similar story. But he did not mention that she had grown old.