Ayesha reported,

I found a document in the hilt of the Messenger of Allah's ﷺ sword which read,"The most insolent of people are three. A man who strikes someone other than the one who struck him, a man who kills someone other than his killer, and a man who attaches himself in loyalty to other than those who showed him kindness. Whoever does any of this has rejected what Allah and His Messenger have revealed. Allah will accept from him neither obligatory worship nor voluntary deeds.The believers are equal in the value of their blood, and the protection granted by the lowest among them is binding upon them all. A Muslim is not to be killed in retaliation for a disbeliever, nor is one bound by a treaty to be killed during the term of his treaty.People of two different religions do not inherit from one another. A woman is not to be married to a man who is already married to her paternal aunt or her maternal aunt. There is no prayer after Asr until the sun sets. And a woman is not to travel for three nights except with a Muharram."

عن عائشة قالت

وجدت في قائم سيف رسول الله ﷺ كتابا: إن أشد الناس عتوا من ضرب غير ضاربه، ورجل قتل غير قاتله، ورجل تولى غير أهل نعمته، فمن فعل ذلك فقد كفر بالله ورسوله، لا يقبل الله منه صرفا، ولا عدلا، وفي الأجر المؤمنون تكافا دماؤهم، ويسعى بذمتهم أدناهم، لا يقتل مسلم بكافر، ولا ذو عهد في عهده، ولا يتوارث أهل ملتين، ولا تنكح المرأة على عمتها، ولا على خالتها، ولا صلاة بعد العصر حتى تغرب الشمس، ولا تسافر المرأة ثلاث ليال مع غير ذي محرم.