al-Sharif al-Radi (d. 406 AH) · Thaqalayn library edition, reproduced verbatim
۴۳۹. وَقَالَ (عليه السلام): الزُّهْدُ كُلُّهُ بَيْنَ كَلِمَتَينِ مِنَ الْقُرْآنِ: قَالَ اللهُ سُبْحَانَهُ : ﴿لِّكَيْلَا تَأْسَوْا عَلَىٰ مَا فَاتَكُمْ وَلَا تَفْرَحُوا بِمَا آتَاكُمْ﴾، وَمَنْ لَمْ يَأْسَ عَلَى الْمَاضِي، وَلَمْ يَفْرَحْ بِالْآتِي، فَقَدْ أَخَذَ الزُّهْدَ بِطَرَفَيْهِ.
439. Amīr al-mu’minīn, peace be upon him, said: The whole of asceticism is confined between two expressions of the Qur’ān. Allāh, the Glorified says : “Lest distress you yourselves for what escapes you, and be overjoyous for what He has granted you” (Qur’ān, 57:23). Whoever does not grieve over what he misses and does not revel over what comes to him acquires asceticism from both its sides.
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