The ruling on one who leaves off stoning the pillars on the twelfth day

May Allah reward you, O Shaykh! What is the ruling on one who leaves off three obligatory acts, such as one who leaves off all the stoning of the pillars on the twelfth day?The Shaykh: All the pillars, from the pillar of Aqabah to the last pillar on the days of Tashriq, are a single obligatory act. If he does not stone them on all the days of Tashriq, he makes one expiation, unless he made an expiation for the first day, in which case he makes an expiation for what comes after.