Prohibition of Burning Papers With Writings on Them
Al-Kāfi|Volume 2|Book 4|Chapter 30
3ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادِ بْنِ عُثْمَانَ عَنْ زُرَارَةَ قَالَ سُئِلَ أَبُو عَبْدِ الله (عَلَيهِ السَّلام) عَنِ الإسْمِ مِنْ أَسْمَاءِ الله يَمْحُوهُ الرَّجُلُ بِالتُّفْلِ قَالَ امْحُوهُ بِأَطْهَرِ مَا تَجِدُونَ.
3. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad ibn ‘Uthman from Zurara who has said the following: “Once Abu ‘Abdillah عليه السلام was asked about a name of the names of Allah that a man tries to delete with his saliva. The Imam said, ‘It should be deleted with the cleanest thing that you can find.’”
- Ṣaḥīḥ al-Kāfī, vol. 1, p. 172