Harith Ibn Yazid, the slave of Marwan was a staunch enemy of Ahl ul-Bayt. One day he came to Imam (a.s) for something and the Imam behaved with him in a very cordial and humble manner. This affected him so much that after this encounter he never spoke ill about the Holy Imam and gradually he began to have so much regard for the Imam that he resigned from the services of Marwan. Reference :Akhlaq al-A’imma, Morals & Manners of the Holy Imams
Humility Of Imam Husayn (a.s) – 3
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