Prohibition of Burning Papers With Writings on Them
Al-Kāfi|Volume 2|Book 4|Chapter 30
5ـ عَلِيٌّ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ بْنِ عَمَّارٍ عَنْ أَبِي الْحَسَنِ مُوسَى (عَلَيهِ السَّلام) فِي الظُّهُورِ الَّتِي فِيهَا ذِكْرُ الله عَزَّ وَجَلَّ قَالَ اغْسِلْهَا.
5. Ali has narrated from his father from Ibn Abi ‘Umayr from Muhammad ibn Ishaq ibn ‘Ammar from abu al-Hassan Musa عليه السلام who has said the following: “The Imam عليه السلام was asked about the surfaces on which a mention of Allah, the Most Majestic, the Most Holy, is written. The Imam said, ‘Wash it clean.’”
- Ṣaḥīḥ al-Kāfī