What must the pilgrim do on the second and third days of the days of Tashriq?

Question : Honorable Shaykh, today is the twelfth day of the month of Dhu al-Hijjah, which is the second day of the days of Tashriq. Please tell us briefly about the acts of this day?

Answer : In the name of Allah, the Most Gracious, the Most Merciful. Praise be to Allah, Lord of the worlds. May Allah send prayers and blessings upon our Prophet Muhammad, his family, his Companions, and those who follow them in excellence until the Day of Judgment.
On the eleventh and twelfth days, there is no act other than stoning the pillars. This is done after the sun has passed its zenith, as we have established, because the Prophet (peace and blessings be upon him) delayed the stoning until the sun passed its zenith and said, "Take from me your rituals." It is not permissible to stone before the sun passes its zenith, neither for the one who hastens nor for the one who delays. He (peace and blessings be upon him) waited until the sun passed its zenith.
And he did not grant a dispensation to anyone to stone before the sun passed its zenith. If stoning before the sun passed its zenith had been permissible, he would have granted a dispensation for it, just as he granted a dispensation for the weak to leave Muzdalifah on the night of the festival to stone before the crowd of people. Moreover, the fact that the Messenger (peace and blessings be upon him) delayed the stoning until the sun passed its zenith and the heat became intense is clear proof that stoning before that is not permissible.
Because if it had been permissible, the Prophet (peace and blessings be upon him) would have done it or directed to it, because stoning before the sun passes its zenith is easier for the Muslims than stoning after the sun passes its zenith, since the beginning of the day is less hot than the end of the day.
Then, he (peace and blessings be upon him) used to stone the pillars before praying the midday prayer. What indicates this is what indicates that he (peace and blessings be upon him and his family) was a person who seized the opportunity of the sun passing its zenith and waited for it. From the time the sun passes its zenith, he hastens to stone.