Let us now turn our attention to the theological teachings of the Jahmiyya, [who trace their name and origin to Jahm ibn Safwan Abu Muhriz].
Peculiar to Jahm ibn Safwan is the assertion that, although certain effects may appear to be produced by human causation, it is only in a metaphorical sense ['ala'l-majaz] that the origin of such effects can be attributed to the human being, not as a matter of reality [la 'ala'l-haqiqa]. [In other words, to attribute any action to a human being is merely a figure of speech], just as it is when one says: "The date palm grew tall, and the fruit ripened."
He always refused to profess the doctrine that Allah is Cognizant of things prior to their coming into existence ['Alim bi'l-ashya'i qabla kawniha]. He maintained that the Garden of Paradise and the Fire of Hell will eventually cease to exist. He also denied the reality of the [Divine] attributes [sifat].
The theological school [madhhab] founded by Jahm was located in a town called Tirmidh, or, according to some authorities, in Marw. He is the author of a literary work on the negation of the [Divine] attributes. He was put to death by Muslim ibn Ahwad al-Marwani.