question #3 Sahih Muslim 21c, Book 1, Hadith 35 : How does Islamic law justify exceptions to the protection of life and wealth?

I have been commanded that I should fight against people till they declare that there is no god but Allah, and when they profess it that there is no god but Allah, their blood and riches are guaranteed protection on my behalf except where it is justified by law, and their affairs rest with Allah, and then he (the Holy Prophet) recited (this verse of the Holy Qur’an):” Thou art not over them a warden” (lxxxviii, 22).