Nahj al-Balāgha
Hadith 2222۳۹۱. وَقَالَ (عليه السلام): ازْهَدْ فِي الدُّنْيَا يُبَصّرْكَ اللهُ عَوْرَاتِهَا، وَلَا تَغْفُلْ فَلَسْتَ بِمَغْفُولٍ عَنْكَ.
391. Amīr al-mu’minīn, peace be upon him, said: Abstain from the world so that Allāh may show you its real evils and do not be neglectful because (in any case) you will not be neglected.