Hazrat Mak'hool (may Allah have mercy on him) said: "If a person says to someone, 'Divorce your wife and I will marry my daughter or sister to you,' and he divorces and marries, then if he wishes to return to his first wife, he can do so."
Hadith Referenceسنن سعید بن منصور / كتاب النكاح / 1856