Abdullah bin Mas'ud (may Allah have mercy on him) said: "There were some people on a journey. One man said: 'Whoever slaughters a goat for us, I will marry my daughter to him, or the daughter who will be born to me.' A man slaughtered a goat. When the girl was born, the issue was referred to Abdullah (may Allah have mercy on him). He said: 'You have become the owner of the woman, but this is not a dowry (mahr).'"