Ṣaḥīḥ al-Bukhārī & Ṣaḥīḥ Muslim

Yazīd ibn Sharīk ibn Tāriq reported: I saw ‘Ali (may Allah be pleased with him) delivering a speech from the pulpit, and I heard him say: "By Allah! We have no book to read except the Book of Allah and what is written in this scroll." He unrolled the scroll, and it showed a list of the types of camels to be given as blood-money and contained other legal matters relating to the killing of game in the sanctuary of Makkah and the expiation for it.

In it was also written: "The Messenger of Allah (may Allah's peace and blessings be upon him) said: 'Madīnah is a sanctuary from ‘Ayr to Thawr (mountains). Whoever innovates something new (in religion) or shelters an innovator in it will incur the curse of Allah, the angels, and all the people, and Allah will accept from him neither an obligatory nor a supererogatory prayer on the Day of Resurrection.

A pledge of protection granted by any Muslim, even of the lowest status is the same and should be honored by all Muslims. Whoever betrays a Muslim in this respect will incur the curse of Allah, the angels, and all the people, and Allah will accept from him neither an obligatory nor a supererogatory prayer on the Day of Resurrection.

Whoever attributes his fatherhood to someone other than his (real) father or takes as his master someone other than his (real) master will incur the curse of Allah, the angels, and all the people, and Allah will accept from him neither an obligatory nor a supererogatory prayer on the Day of Resurrection.'"