Abu al-Tufayl reported: It was said to Hudhayfah, may Allah be pleased with him, “Who are the dead among the living?” Hudhayfah said, “Those who do not recognize good in their hearts and do not reject evil in their hearts.”
Source: Muṣannaf Ibn Abī Shaybah 37577
عَنْ أَبِي الطُّفَيْلِ قَالَ قِيلَ لِحُذَيْفَةَ رضي الله عنه مَا مَيِّتُ الْأَحْيَاءِ قَالَ مَنْ لَمْ يَعْرِفِ الْمَعْرُوفَ بِقَلْبِهِ وَيُنْكِرِ الْمُنْكَرَ بِقَلْبِهِ
37577 مصنف ابن أبي شيبة كتاب الفتن ما ذكر في فتنة الدجال