Fasting on the of Arafah

Abu Qatadah Al-Ansari (RAA) narrated, ‘The Messenger of Allah (ﷺ) was asked about fasting on the day of Arafah (the 9th of the month of Dhul Hijjah). He replied, “Fasting on the day of Arafah is an expiation for the preceding year and the following year.”