“I heard Abū Thawr say that al-Shāfiʿī had said to him: ‘Abū Thawr, I have never seen anyone embrace any aspect of speculative theology and prosper.’”

It is also related that Abū Yūsuf said: “Knowledge of speculative theology leads to heresy.” And it is related from Abū ʿUmar al-Darīr