Ja'da bint al-Ash'at

Ja'da bint al-Ash'at (Full name:Ja'da bint al-Ash'at ibn Qays al-Kindi) was the wife of Imam Hasan Ibn Ali. Shia and some Sunni scholars believe that she killed her husband in 670 CE with poison at the instruction of Mu'awiya. According to Madelung, these reports are not, as often suggested, accepted only by Shi'ite sources, but also by the major Sunnite historians al-Waqidl, al-Mada'inl, Umar b. Shabba, al-Baladhuri and al-Haytham b. 'Adi. Few details about her early life are known. She was of Yemeni origin from the tribe of Kindah (كندة).
Shia Muslims believe that Ja'da was promised gold and marriage to Yazid. Seduced by the promise of wealth and power, she poisoned her husband, and then hastened to the court of Muawiyah in Damascus to receive her reward. Muawiyah reneged on his promises and married her to another man.