The ruling on fasting the day before or after 'Ashura

Question:
What is its name? I have two questions, Shaykh. The first question is about fasting the Day of 'Ashura: is it necessary to fast the day before it or the day after it, or is fasting the Day of 'Ashura alone sufficient? Please, let the Shaykh answer.

Answer:
Yes, fasting the day of 'Ashura is a confirmed recommended practice (sunnah muakkadah), and Allah expiates the sins of the previous year through it. It holds great virtue, and it is the sunnah of the Prophet Muhammad (peace and blessings be upon him), following the sunnah of Musa (peace be upon him) before him. It is a confirmed sunnah and carries great reward. However, it is better to fast the day before it, based on his saying (peace and blessings be upon him) and in another narration and the tenth. If the day before it is missed, you fast the day after it; because it was reported in a narration: "Fast ." Yes.