Please note: this fatwa has been translated by artificial intelligence.
Question
Is it permissible for me to fast on the ninth day of Muharram, and on the tenth and eleventh, or is it better to fast on the ninth and tenth, or the eleventh or twelfth?
Answer
I say, and with God's success: It is Sunnah to add another day to the tenth, but fasting the three days is an increase in the desired worship, so it is more complete, and God knows best.