Sayyiduna Ibn Umar (may Allah be pleased with them both) gave his wife one divorce while she was in her menstrual period. Sayyiduna Umar (may Allah be pleased with him) asked the Prophet (peace and blessings be upon him) about this issue, so the Prophet (peace and blessings be upon him) said: Tell him to take his wife back, then after she becomes pure, he may divorce her, or if she is in a state of pregnancy, he may also divorce her.