Hence do not close your eyes against the Light of Truth and...
Hence do not close your eyes against the Light of Truth and do not fall into the pit of falsehood. Sakhr bin Qays misled you on the day of (the battle of) Jamal and disgraced you, hence wash off the stains of disgrace from yourselves by assisting the grandson of the Prophet. By Allah! None will withhold their hands from assisting him except that their progeny will be humiliated, deprived and abandoned. I have now worn the helmet for the battle and have fastened the armor.
For the one who is not killed will ultimately die, and the one who flees from it will not escape it. Thus answer me well, may Allah’s blessings be upon you.” Hearing this the Bani Hanzalah said, “O Aba Khalid! (referring to Yazid bin Mas’ood) We are the quiver of your arrows and the champions of the clan. If you hurl us (towards the enemy) we shall fall upon the target, and if you accompany us in the battlefield you shall emerge a victor.
If you enter the depths of the sea we too shall accompany you, and turn to whichever side you turn to. We shall defend you with our swords and our bodies shall be your shield. We are at your disposal whenever you need us.” Then Bani Sa’ad bin Yazid said, “O Aba Khalid! The most abhorred thing in our sight is opposing you and failing to accept your command.
Verily Sakhr bin Qays had forbade us to fight (on the day of the battle of Jamal) and we were pleased by this act of ours and our dignity remained intact. You may give us respite so that we may counsel among ourselves and let you know our opinions regarding it.” While the Bani Amir bin Tameem said, “O Aba Khalid! We are the children of your father and your confederates. If you are displeased, we shall not remain satisfied, and if you leave, we shall not linger behind.
Hence command us so that we may respond, and call us so that we may obey you. Verily command is with you.” Then he told the Bani Sa’ad, “O Bani Sa’ad! By Allah! Then if you are in doubt and you shall side with the Bani Umayyah (and fail to assist Husayn), Allah will never lift the sword away from your necks, while you still hold your swords.” Then he (Yazid bin Mas’ood) wrote a reply to Imam Husayn (a.s.), “Now then!
We have received you letter and have pondered over that which you have invited, that we may have our share of obedience to you and we may attain the excellence of assisting you. Allah never lets the earth to remain empty of His Vicegerent, who is benevolent and the guide to the path of salvation.