Lady Hafsa (may Allah be pleased with her) narrates that I did not see the Messenger of Allah (peace be upon him) performing his voluntary prayers sitting, until when he was in the period of one year before his death, he (peace be upon him) started performing his voluntary prayers sitting. Whenever he (peace be upon him) would recite a surah, he would recite it with such pauses and deliberation that it would become longer than the longest surah. Ibn Hisham did not mention the words "in his voluntary prayer."