Excerpt from 'Maqtal al-Husayn':
Abu Thumama al-Sa’idi looked at the sun and saw that it was already after-noon, so he said to al-Husayn (A), 'May I be sacrificed for your sake! I can see that these folks have advanced towards you. No, by Allah, you shall not be killed before I die defending you, and I love to return to Allah after having performed the prayers whose time has approached.'
Al-Husayn (A) raised his head to the heavens and said, 'You have remembered the prayers, may Allah count you among those who uphold the prayers and who remember Him often. Yes, this is the beginning of its time. Ask them to leave us alone so that we may perform the prayers.' Al-Hasin, who had heard the Imam (‘a) say these words, commented by saying, 'It [your prayer] will not be accepted!'
Habib Ibn Muzahir heard what that rogue had said, so he responded to him by saying, 'Do you claim that prayers are not accepted from the Prophet's Family but yours are accepted...?! Al-Hasin charged at him, so Habib slapped the face of al-Hasin's horse, causing it to leap and throw its rider on the ground. Al-Hasin's men had to rush to his rescue and to carry him away to safety.
Habib, despite his advanced age, fought them valiantly, killing as many as sixty-two men. Badil Ibn Sarim attacked him and dealt a sword blow to him as a man from Tamim hit him with his lance. Habib now fell on the ground.
As he attempted to stand up again, al-Hasin hit him with his sword on the head, causing him to fall again on his face. The man from Tamim alighted and severed Habib's head. Habib being thus killed shook al-Husayn (A) who said, 'It is only to Allah that I complain about what has happened to me and to my companions.' For a good while, the Imam (‘a) kept repeating the statement: Inna-Lillahi wa inna ilayhi rajia’un [We belong to Allah, and to Him is our return].