Ayesha reported,

They used to fast on Ashura before the fasting of Ramadan was made obligatory, and it was a day on which the Kaabah was draped with a covering.

Azami 10586

Sahih

عن عائشة قالت

كانوا يصومون عاشوراء قبل أن يفرض رمضان، وكان يوما تستر فيه الكعبة.

الأعظمي 10586صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Virtues of the lands
Chapter
Virtue of Makkah and reports about it
Section
Covering of the noble Kaaba
Numbering
Jami al-Kamil 10586 (2nd edition)
Azami 10586