The relationship between the Hussaini cause and the significance of the hijab becomes clear when considering Imam Hussain's (a)jihad against Yazid. His struggle was against disbelief, hypocrisy, and the existential threat posed by the Umayyad campaign to Islam. Imam Hussain (a)knew the betrayal of the ummah was inevitable, yet his martyrdom aimed to awaken the conscience of the Muslim community, fulfilling God's command: {O you who have believed, respond to Allah and to the Messenger when he calls you to that which gives you life}. 
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The Historical Context of Ashura
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Ashura marks the day when Imam Hussain (a), the grandson of Prophet Muhammad (s), was martyred in Karbala. His sacrifice was not merely a battle but a stand for Islamic values and principles. The cause of Ashura embodies the essence of Islam, with Imam Hussain's (a) uprising dedicated top reserving and establishing the religion.
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The Role of Hijab in Islamic Jurisprudence & Ashura
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Hijab is a fundamental aspect of Islamic jurisprudence, emphasized in the Quran and Hadith as an Islamic obligation:

"...and not display their beauty except what is apparent, and they should place their head-coverings over their bosoms..."(24:31)

"O Prophet! Say to your wives, your daughters, and the women of the believers that: they should let down upon themselves their loose outer garments." (33:59)

These verses underline the hijab as a significant tenet of Islam, one that Imam Hussain (a) and his family upheld even in the direst circumstances.

Hijab in the Events of Ashura

Several incidents from Ashura underscore the importance of hijab, demonstrating how it was a core principle upheld by Imam Hussain (a) and his companions:
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-         Imam Hussain’s (a) Will: He instructed his sisters, daughter, and wife not to mourn excessively or tear their clothes, emphasizing dignity and modesty even in tragedy. This reflects the broader struggle to maintain Islamic values against corruption and immorality.
-         Protection of the Women’s Hijab: Imam Zayn al-Abideen (a) endeavored to protect the hijab of the Prophet’s household women, even when facing death. He requested Ibn Ziyad to assign a pious man to ensure they were treated according to Islamic conduct, showing the importance of upholding Islamic tenets under all circumstances.
-         Umm Kulthum’s Request: On the way to Damascus, Umm Kulthum asked Shimr to take them through a less crowded path to avoid the shame of being gazed upon, highlighting the emphasis on modesty that was part of their core values.
-         Sayyida Zainab’s (a) Reprimand: In her sermon to Yazid ibn Muawiya, Lady Zainab (a) condemned the act of parading the daughters of the Prophet with their veils torn off, contrasting it with Yazid’s treatment of his own women. Her words reinforced the sacredness of hijab and its violation as an act of profound disrespect and injustice.

A Lesson for Us
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Maintaining modesty was crucial for Imam Hussain (a)and his companions in Karbala. The hijab was among the divine commandments he was martyred to uphold. To truly honor his legacy, we must preserve our chastity and modesty, aligning ourselves with the principles for which he sacrificed his life.