Fast on the day of Ashura

This hadith is about the importance of fasting on the day of Ashura. It was narrated by Yahya from Malik that Umar ibn al-Khattab sent a message to al-Harith ibn Hisham instructing him to fast on this day and also telling his family members to do so as well. This hadith emphasizes the importance of fasting in Islam and how it is an obligation for all Muslims. It also shows us how important it is for us as Muslims to spread knowledge about our religion and its teachings so that others can benefit from it too. We should strive not only for ourselves but also for our families when it comes to religious matters such as fasting or any other Islamic practice.