‘Abdullah ibn al-Mubarak [d. 181 AH] – “Every group knows whom they are worshipping except the Jahmiyyah.”

Imam al-Bukhari said: 'Abdullah b. al-Mubarak said: "Every group knows whom they are worshipping except the Jahmiyyah." → Khalq Af'aal al-'ibaad ⎯ Pg. 38 | Imam al-Bukhari [Edition: Dar 'Ukadh] | Translated by: Abu Dawūd [Mustafa b. Saalih] al-Hushayshi

Ibn Qudāmah al-Maqdisi [d. 1223 CE] on those who delve into Kalaam [Theological Rhetoric i.e the Jahmiyyah & Mu’tazilah]

Ibn Qudāmah said, "If someone were to be afflicted and beset with every matter prohibited by Allaah ﷻ - not including Shirk - it would be better for him than for him to concern themselves [eagerly] with looking into kalaam." → al-Burhān fi-Bayan al-Qur'an – Pg. 58 | Ibn Qudāmah al-Maqdisi | Translated by: Abu Dawūd … Continue reading Ibn Qudāmah al-Maqdisi [d. 1223 CE] on those who delve into Kalaam [Theological Rhetoric i.e the Jahmiyyah & Mu’tazilah]