Abū al-Ḥasan Muḥammad Ibn ʿAbd Al-Malik al Karjī al-Shafiʿī (رحمه الله) (d.532) mentioned in his book, Al-Fuṣūl fī al-Uṣūl ʿan al-Aʾimmah al-Fuḥūl, Ilzāman li Dhawī al-Bidʿah wa al-Fuḍūl, that there were Mālikī scholars who were negatively affected by their adoption of the Ashʿarī belief, and that this was no doubt something blameworthy.

He states, “And there were also those from the Mālikīs who were induced by the madhhab of the Ashʿarīs, and this is—by Allāh—a disgrace, shame and a fault, which will bring about negative consequences, punishment and an evil state for the one who (adopts the beliefs of the Ashʿarīs and) traverses the path of these learned imāms (i.e. those who ascribe themselves to one of the four madhāhib in issues of fiqh).”

 1 Al-Fuṣūl fī al-Uṣūl ʿan al-Aʾimmah al-Fuḥūl, Ilzāman li Dhawī al-Bidʿah wa al-Fuḍūl, (pg. 18)