Sahih Al Bukhari (726)

عن أنس بن مالك قال: قال رسول الله صلى الله عليه وسلم: (أمرت أن أقاتل الناس، حتى يقولوا لا إله إلا الله، فإذا قالوها، وصلوا صلاتنا، واستقبلوا قبلتنا، وذبحوا ذبيحتنا، فقد حرمت علينا دماؤهم وأموالهم، إلا بحقها، وحسابهم على الله).

Anas ibn Malik (may Allah be pleased with him) narrated: Allah’s Messenger (peace be upon him) said, “I have been ordered to fight the people till they say: ‘None has the right to be worshipped but Allah.’ And if they say so, pray like our prayers, face our Qiblah and slaughter as we slaughter, then their blood and property will be sacred to us and we will not interfere with them except legally and their reckoning will be with Allah.” Narrated Maymun ibn Siyah that he asked Anas ibn Malik, “O Abu Hamza! What makes the life and property of a person sacred?” He replied: “Whoever says, ‘None has the right to be worshipped but Allah’, faces our Qiblah during the prayers, prays like us and eats our slaughtered animal, then he is a Muslim, and has got the same rights and obligations as other Muslims have.”