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Conclusion

The sermon of Lady Zaynab exposed the true face of the family of Abu Sufyan to the people of Sham, and the sermon of Imam Zayn Al-Abidin showed the true status of the Ahlul Bayt to the people of Sham.

Its immediate result was that Yazid feared the reaction of the people and started distancing himself from the killing of Imam Husayn bin ‘Ali and blaming everything on Ibn Ziyad!
He was forced to release the family of Ahlul Bayt and send them to Medina respectfully.