Chapter on What Allah سبحانه وتعالى, the Almighty, Has Made Permissible and Prohibited in Marriage

Muhammad ibn Qays narrated from Abu Ja'far Imam Muhammad ibn Ali Al-Baqir عليه السلام: Regarding a man who had four wives and divorced one of them, then married another woman before the divorced wife had completed her waiting period. Imam عليه السلام ruled: "The latter wife must return to her family until the divorced wife completes her waiting period. After that, the latter wife must observe a new waiting period. If he had consummated the marriage with her, she is entitled to her dowry. However, if he had not consummated the marriage, she has no dowry and no waiting period required for her. After her waiting period ends, if her family wishes, they may give her back in marriage to him, and if they wish, they may refuse."