“’Amir al-Mu’minin once passed by a man who was performing al-Duha’ (optional Salah (prayer) at noontime before Zawal (declining of the sun toward the west at noontime) in Masjid of al-Kufah. He (’Amir al-Mu’minin) poked his side with his whip (handle) and said, ‘You cut the throat of the Salah (prayer) of repenting people, may Allah cut your throat.’ He asked, ‘Must I omit it? He (the Imam) said that ’Amir al-Mu’minin said, “Have you seen the one who forbids a servant who performs Salah (prayer)” (96:9,10) he added.’ Abu ‘Abd Allah (a.s.), then said, ‘The denial of Amir al- Mu’minin is sufficient prohibition to perform such Salah (prayer).”’ (’Amir al-Mu’minin meant that it is not permissible to prohibit Salah (prayer) but Salah (prayer) of a prescribed time performed before its time is not a Salah (prayer). (It seems the man performed the optional Salah (prayer) soon after Zawal (declining of the sun toward the west at noontime) before its due time).