Arba'een Pilgrimage
... that Arba'een Pilgrimage, the world's largest annual gathering, is held every year 40 days after Ashura for the commemoration of Husayn ibn Ali's death?
... that <b id="mwCcE"><a class="mw-redirect" href="./Arba'een_Pilgrimage" id="mwCcI" rel="mw:WikiLink" title="Arba'een Pilgrimage">Arba'een Pilgrimage</a></b>, the world's largest annual gathering, is held every year 40 days after <a class="mw-redirect" href="./Day_of_Ashura" id="mwCcM" rel="mw:WikiLink" title="Day of Ashura">Ashura</a> for the commemoration of <a href="./Husayn_ibn_Ali" id="mwCcQ" rel="mw:WikiLink" title="Husayn ibn Ali">Husayn ibn Ali</a>'s death?