“I asked Abil Hassan Al-Hadi (MGB), ‘Why is it that there are fifty units of obligatory and supererogatory prayers each day and night and no more or less?’ He (MGB) replied, ‘There are twelve hours in each night and there is an hour from dawn until sunrise. There are also twelve hours in each day (which adds up to twenty-four plus one). There are two units for each hour. The time from sunset to darkness is called Al-Qasq.”