The Shaykh (Al-Mufid), may Allah سبحانه وتعالى support him, said: ‘And whoever errs in the recitation’ up to his statement: ‘And whoever recites a surah’, the explanation of all of that has already passed. Then the Shaykh, may Allah سبحانه وتعالى have mercy on him, said: ‘And whoever recites a surah after ‘al-Hamd’ and then wishes to recite another one, he may abandon it and recite a different one, so long as he has not passed the halfway point of the surah. But if he recites ‘Qul Huwa Allahu Ahad’ or ‘Qul Ya Ayyuhal-Kafirun’, he is not permitted to turn back from them.’
Commentary #17