Ali ibn al-Hasan reported from Ahmad ibn al-Hasan, from Amr ibn Sa‘id, from Musaddiq ibn Sadaqah, from Ammar al-Sabati, from Abu Abdillah عليه السلام. He (Narrator) said: “I asked Imam عليه السلام about a woman whose husband has intercourse with her, and then she begins menstruating before performing ghusl (ritual bath) for janabah (major impurity).” Imam عليه السلام replied: "If she wishes to perform ghusl, she may do so, and if she does not, there is no obligation upon her. However, when she becomes pure from menstruation, she should perform one ghusl for both menstruation and janabah."