'A'isha reported that when the Messenger of Allah (ﷺ) decided upon doing any act , he continued to do it , and when he slept at night or fell sick he observed twelve rak'ahs during the daytime. I am not aware of Allah's Messenger (ﷺ) observing prayer during the whole of the night till morning , or observing fast for a whole month continuously except that of Ramadan.