Volume 4, Book 53, Number 397:
Narrated Ibrahim At-Tamimi’s father:
‘Ali delivered a sermon saying, “We have no book to read except the Book of Allah and what is
written in this paper which contains verdicts regarding (retaliation for) wounds, the ages of the
camels (given as Zakat or as blood money) and the fact that Medina is a sanctuary in between Air
mountain to so-and-so (mountain). So, whoever innovates in it an heresy or commits a sin or gives
shelter in it, to such an innovator will incur the Curse of Allah, the angels and all the people, and
none of his compulsory or optional good deeds of worship will be accepted. And whoever (freed
slave) takes as his master (i.e. befriends) other than his real masters will incur the same (Curse). And
the asylum granted by any Muslim is to be secured by all the other Muslims, and whoever betrays a
Muslim in this respect will incur the same (Curse).”