Shaykh al-Islam Ibn Taymiyyah (may Allah have mercy on him) said in Bayan Talbis al-Jahmiyyah (2/604-629) and (3/3-49):

Abu Sa‘id ‘Uthman bin Sa‘id al-Darimi said in his book titled: Naqd ‘Uthman bin Sa‘id ‘ala al-Marisi al-Jahmi al-‘Anid, fima Iftara ‘ala Allah Ta‘ala fi al-Tawhid (The Refutation of ‘Uthman bin Sa‘id against al-Marisi, the Obstinate Jahmi, regarding what he fabricated against Allah the Exalted concerning Monotheism), in which he stated:

(Chapter on the Limit and the Throne)

The opponent also claimed: “That He has no limit (hadd), no extreme (ghayah), and no end (nihayah).”

He [al-Darimi] said: This is the principle upon which Jahm built all of his misguidance and from which he derived his fallacies. It is a statement that we have not heard anyone in the world preceding Jahm in making.

A speaker from among those debating him said to him: “I have understood your intention, O non-Arab (A‘jami); you mean that Allah the Exalted is nothing (la shay’). This is because all of creation knows that there is nothing to which the name ‘thing’ applies except that it has a limit, an end, and an attribute, and that ‘nothingness’ has no limit, no end, and no attribute. A thing is always and inevitably described, and nothing is described without a limit or an end. Your statement: ‘He has no limit’ means that He is nothing.”

Abu Sa‘id said: Allah the Exalted has a limit that none knows but He. It is not permissible for anyone to imagine an end for His limit within themselves; rather, we believe in the limit and we entrust the knowledge of that to Allah the Exalted. His place also has a limit, and He is upon His Throne above His heavens; thus, these are two limits.

He [al-Darimi] said: And Ibn al-Mubarak was asked: “By what do we recognize our Lord?”