The Ruling on Fasting Ashura and Isolating It from the Ninth

Question:
From the brother and the fast. In the days of Ashura, where we have heard some say that the best is three days. Yes. We have heard some say that the best is fasting the ninth along with the tenth, and also what is the ruling on isolating the day of Ashura? And where there are, as described, those who say it is permissible, those who say it is disliked, and those who say it is forbidden.

Answer:
What concerns us is not what so-and-so says or what so-and-so says; what concerns us is the words of the Messenger of Allah (peace and blessings be upon him): "Fast a day before it, differ from the Jews. If I remain until next year, I will fast the ninth and the tenth." So we act according to the saying of the Messenger of Allah (peace and blessings be upon him): we fast the ninth and the tenth. This is what we act upon. As for what so-and-so said or so-and-so said, it is none of our concern.