From Ibn Mahbub, from Ali ibn Ri’ab, from Abu al-Ward: He (Narrator) said: “I asked Abu Ja’far عليه السلام about a woman who is performing the Dhuhr prayer and has completed two rak’ahs, then she sees blood (indicating menstruation).” Imam عليه السلام said: "She should leave her place of prayer and is not required to make up the two rak’ahs." Then Imam عليه السلام said: "If she sees blood while performing the Maghrib prayer and has already completed two rak’ahs, she should leave her place of prayer. However, when she becomes pure, she must make up the one rak’ah that she missed from the Maghrib prayer."