Chapter on Menstruation, Istihada (abnormal bleeding), and Nifas (postpartum bleeding)

Ali ibn Al-Hasan ibn Fadhal narrated from Muhammad ibn Al-Rabi’, who said Saif ibn Amira narrated from Mansur ibn Hazim: Abu Abdullah عليه السلام, said: "If a menstruating woman attains purity before the time of ‘Asr, she should perform both the Dhuhr and ‘Asr prayers. However, if she attains purity at the end of the time for ‘Asr, she should perform only the ‘Asr prayer."