In every rakʿah of the obligatory and recommended prayers, one must perform two sajdahs after rukūʿ. A sajdah is performed when one places his forehead on the ground in a particular manner with the intention of humility [before Allah]. While performing a sajdah in prayers, it is obligatory that the palms of both hands, both knees, and both big toes be placed on the ground. Based on obligatory precaution, [for the purposes of sajdah] the ‘forehead’ refers to its middle area, i.e.
the rectangular area when two imaginary lines are drawn between the place where the eyebrows begin[1] in the middle of the forehead up to the point where the hair grows.