The Jamrat al-'Aqabah is the one that is stoned with seven pebbles on the day of 'Id
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Question: Which of the pillars is stoned with seven pebbles on the first day?
Answer: The pillar that follows Mecca, the one called Jamrat al-'Aqabah, which is the last of the pillars from the direction of Mecca, is stoned with seven pebbles on the day of 'Id. As for the eleventh, twelfth, and thirteenth days, for those who do not hasten to leave, it is obligatory for them to stone the three pillars after the sun passes its zenith. They begin with the one closest to the Musjid al-Khaif, which is the nearest from the direction of the Musjid al-Khaif, starting with it, then the middle one, and then the last one, which they stoned on the day of 'Id and which is called Jamrat al-'Aqabah.
Answer: The pillar that follows Mecca, the one called Jamrat al-'Aqabah, which is the last of the pillars from the direction of Mecca, is stoned with seven pebbles on the day of 'Id. As for the eleventh, twelfth, and thirteenth days, for those who do not hasten to leave, it is obligatory for them to stone the three pillars after the sun passes its zenith. They begin with the one closest to the Musjid al-Khaif, which is the nearest from the direction of the Musjid al-Khaif, starting with it, then the middle one, and then the last one, which they stoned on the day of 'Id and which is called Jamrat al-'Aqabah.
Source
binbaz.org.sa
The Arabic text is copied verbatim from the original source, without any edits.