"I am appalled by your bad judgement and astounded by your policies. Why are you so intent on giving amān, even to an enemy whom you have tested and found hostile and intransigent? It is not necessary to give amān to everyone without discrimination. … In any case, if [the Sindis] sincerely request amān and desist from treachery, they will surely stop fighting. Then income will meet expenditures and this long situation can be concluded."
January 1, 1970
https://en.wikiquote.org/wiki/Muhammad_ibn_Qasim