Al-Harith ibn Mansur reported: Sufyan al-Thawri, may Allah have mercy on him, said, “A time will come to people in which the hearts are dead even as the bodies are alive.”
Source: Ḥilyat al-Awliyā’ 7/82
عَنْ الْحَارِث بْن مَنْصُورٍ قَالَ سُفْيَانُ الثوري رحمه الله يَأْتِي عَلَى النَّاسِ زَمَانٌ تَمُوتُ فِيهِ الْقُلُوبُ وَتَحْيَى الْأَبْدَانُ
7/82 حلية الأولياء وطبقات الأصفياء