“I heard Rabi‘ al-Ra’iy saying, ‘It is my opinion that al-‘Iqra’ which Allah, most Majestic, most Glorious, has mentioned in the Quran is nothing but Hayd (menses)-free period between the two Hayd (menses).’ He (the Imam) said, ‘He has spoken a lie. It is not his opinion. In fact it has reached him from Ali (a.s.).’ I then said, ‘I pray to Allah to keep you well, did Ali (a.s.), say so?’ He (the Imam) said, ‘Al-Qur’ means clean. Blood stops coming out and accumulates. During Hayd (menses) it is pushed out.’” (Al-Qur’ means accumulates and Hayd means flows).