Shafi’i on Dispute: Arguing about the religion results in hateful hearts

Al-Rabia’ ibn Sulayman reported: Al-Shafi’i, may Allah have mercy on him, said, “Arguing about sacred knowledge hardens the heart and produces resentment.”

Source: al-Madkhal ilá al-Sunan al-Kubrá 178

عن الرَّبِيع بْن سُلَيْمَان قال الشَّافِعي رحمه الله الْمِرَاءُ فِي الْعِلْمِ يُقَسِّي الْقَلْبَ وَيُوَرِّثُ الضَّغائِنَ

178 المدخل إلى السنن الكبرى للبيهقي