Letter 67
After glorifying Allah and praising the Holy Prophet (s) let it be known to you that I am leaving this city either as an oppressor or oppressed, either I am revolting against the people or some of them have conspired to revolt against the people or against me. Whatever the case may be I invite in the Name of Allah those to whom this letter reaches, to come and see for themselves whether I am in the right or on the wrong. If they find me on the path of truth and justice they may help me and if they find that I am on the wrong then they can reason me out of it.
Letter 66
When Imam Ali (a) appointed Shuray bin Hani as commanding officer of the vanguard of his army, which was marching towards Syria, he gave Hani the following instructions.
Letter 68
A letter sent by Imam Ali (a) to the people of various provinces, giving them the causes of the Battle of Siffin.