We have nothing except the Book of Allâh and this written paper from the Prophet (ﷺ) (wherein is written): Al-Madîna is a sanctuary from the ' A'er Mountain to such and such a place, and whoever innovates in it an heresy or commits a sin, or gives shelter to such an innovator or sinner in it will incur the curse of Allâh, the angels, and all the people, none of his compulsory or optional good deeds of worship will be accepted. And the asylum (of protection) granted by any Muslim is to be secured (respected) by all the other Muslims; and whoever betrays a Muslim in this respect incurs the curse of Allâh, 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 masters other than his manumitters without their permission incurs the curse of Allâh, the angels, and all the people, and none of his compulsory or optional good deeds of worship will be accepted. [3:94-O.B]