From the servant of Allah `Ali, Amir al-mu'minin, to all the collectors of revenue and officers of the realm through whose area the army passes.
Now, I have sent an army that will pass by you, if Allah wills. I have instructed them about what Allah has made obligatory on them, namely that they should avoid molestation and avert harm. I hold myself clear before you and those (unbelievers) who are under your protection from any annoyance committed by the army except when one is compelled by hunger and there is no other way of satisfying it. If anyone of them takes anything through force you should punish him. None of you should be foolish enough to obstruct them or intervene in matters which we have allowed them by way of exception. I am myself within the army. So, refer to me their high-handedness and any hardship which is caused by them and which you cannot avert except through Allah and through me. I shall then avert it with the help of Allah, if He so wills.