“Abu Ja‘far (a.s.), has said that ’Amir al-Mu’minin (a.s.), issued a judgment about the case of two sisters, of whom one had married a man who divorced her, and she was pregnant, then proposed marriage to her sister and married her before her divorced sister gave birth, he (the Imam) commanded them to separate from the one married last until her sister gives birth, then he can propose marriage to her and assign mahr (dower) for her twice.’”