Sayyidah Aishah (may Allah be pleased with her) said that two writings were found in the scabbard of the Prophet (peace and blessings be upon him); (the narrator) mentioned one of them, and in the other was written: "The blood of the believers is equal; the protection granted by the lowest of them is honoured; a Muslim will not be killed in return for a disbeliever, nor one who has a covenant while his covenant lasts; a disbeliever does not inherit from a Muslim, nor a Muslim from a disbeliever. A woman and her paternal aunt, or a woman and her maternal aunt, cannot be combined in one marriage. There is no prayer after Asr until the sun sets. A woman may not travel for three nights without a mahram."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 15915