…فغضب شمر لعنه الله و جلس على صدر الحسين و قبض على لحيته و هم بقتله فضحك الحسين ع فقال له أ تقتلني و لا تعلم من أنا فقال أعرفك حق المعرفة أمك فاطمة الزهراء و أبوك علي المرتضى و جدك محمد المصطفى و خصمك العلي الأعلى أقتلك و لا أبالي فضربه بسيفه اثنتي عشرة ضربة ثم جز رأسه صلوات الله و سلامه عليه و لعن الله قاتله و مقاتله و السائرين إليه بجموعهم.
..Then Shimr (may Allah curse him) became angry and sat on the chest of Husain, seized his (peace be upon him) beard with the intention of killing him (peace be upon him). Husain (peace be upon him) laughed and asked him, “Will you kill me knowing well who am I?” He replied, “I know very well. Your mother is Fatemah al-Zahra (peace be upon her), your father is Ali al-Murtaza (peace be upon him) and your grandfather is Muhammad al-Mustafa (peace be upon him and his holy progeny) and your supporter is Allah the High, the Highest. Yet, I will kill you and I don’t care.” Then, he struck him (peace be upon him) twelve times with his sword and decapitated the head of Husain (peace be upon him).May Allah curse his killer and those who fought against him (peace be upon him) and their entire group.
References:
1. Behaar al-Anwaar, vol. 45, p. 56, Chapter 37