When one keeps Quran close to their heart, learn of The Promises and Sunnah of Allah from it, and have full reliance on Him.

Allahumma baarik lahu. Such Iman subhanallah

Do we fast the 9th, 10th, or 11th? | The 4 Levels of Fasting Ashura

| Ash-Shaykh al-Imām Ahmad Musa Jibril (حفظه الله تعالى)

🎥 Everything You Need to Know About the Day of Ashura: https://youtu.be/WPrnCmFPqDY

Training Our Kids to Fast the Day of ‘Āshūrā

| Ash-Shaykh al-Imām Ahmad Musa Jibril (حفظه الله تعالى)

🎥 Everything You Need to Know About the Day of Ashura: https://youtu.be/WPrnCmFPqDY

Once it's Gone, it's Gone 💨

كان محمد بن شهاب الزهري رحمه الله في سفر فصام يوم عاشوراء، فقيل له: تصوم يوم عاشوراء في السفر وأنت تفطر في رمضان؟ فقال: إِنَّ رَمَضَانَ لَهُ عِدَّةٌ مِنْ أَيَّامٍ أُخَرَ، وَإِنَّ عَاشُورَاءَ تَفُوتُ.

Imām al-Zuhrī (d.124H) was traveling on the day of 'Āshūrā while he was fasting. Someone said to him: "You're fasting on the Day of 'Āshūrā while traveling, and yet you break your fast in Ramadān [when traveling]?"

He replied: "[Fasts missed in] Ramadān may be redeemed on other days, but if you miss 'Āshūrā, it can't be so."

• شعب الإيمان للبيهقي (٣٥١٨)

https://www.islamqa.info/amp/en/answers/21787

Praise be to Allah.

Firstly:

You should not observe voluntary fasts when you still owe one or more days from Ramadan, rather you should start with the fasts that you owe from Ramadan, and then observe voluntary fasts.

Secondly:

If you fast the tenth and eleventh of Muharram with the intention of making up days that you owe from Ramadan, that is permissible and will make up for two of the days that you owe. The Prophet (peace and blessings of Allah be upon him) said, “Actions are judged but by intentions, and every person will have but that which he intended.” Fatawa al-Lajnah al-Daa’imah, 11/401

We hope that you will have the reward for making up the missed fast and the reward for fasting that day.

Fatawa Manaar al-Islam, by Shaykh Muhammad ibn ‘Uthaymeen (may Allah have mercy on him), 2/358.

Summary of answer:
If a person intends to do the mustahabb action, that will not be acceptable for the obligatory action. If a person fasts with the intention of 'Ashura, that will not be acceptable as making up for a missed Ramadan fast,

but if he intends to make up the missed Ramadan fast and does that on the day of 'Ashura, then his making up the missed fast will be valid, and there is the hope that he will also attain the reward for 'Ashura, according to some scholars.

https://www.islamqa.info/amp/en/answers/128256

⚡️A painful scene from the horrific massacre committed by the occupation against the displaced in an UNRWA school in the Nuseirat camp in the central Gaza Strip.

"One way to make up for what you have missed out on of reward is to fast whatever you are able to of Muharram, the sacred month of Allah, because of its virtue, as Muslim (1163) narrated that Abu Hurayrah (may Allah be pleased with him) said: The Messenger ﷺ said: “The best fast after Ramadan is Muharram, the sacred month of Allah." 

With regard to expiation of sins, that may be attained by renewing and perfecting your repentance, and constantly asking Allah for forgiveness.

And Allah knows best."

Via: islamqa.info Q225093 (Saalih Al Munajjid)

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Also, sisters who cannot fast due to obedience to husband, do remember that obedience to him is obligatory and obligation weighs more than Sunnah, mustahabb actions. May our Lord be pleased with you.

So be sincere in your actions, be true to Allah, hoping for the best of rewards.