Fudayl on Moderation: Too much food and sleep hardens the heart

Ibn Asakir reported: Al-Fudayl ibn Iyad, may Allah have mercy on him, said, “Two characteristics harden the heart: too much sleeping and too much eating.”

Source: Tārīkh Dimashq 48/422

عن ابن عساكر قال الفضيل رحمه الله خصلتان تقسيان القلب كثرة النوم وكثرة الأكل

48/422 تاريخ دمشق لابن عساكر