Al-Kāfi

Hadith 379
silence
9ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ مُحَمَّدِ بْنِ عِيسَى عَنْ يُونُسَ عَنِ الْحَلَبِيِّ رَفَعَهُ قَالَ قَالَ رَسُولُ الله (صَلَّى اللهُ عَلَيْهِ وآلِه) نَجَاةُ الْمُؤْمِنِ فِي حِفْظِ لِسَانِهِ.
9. Ali ibn Ibrahim has narrated from Muhammad ibn ‘Isa from Yunus from al- Halabi in a marfu’ manner from the Messenger of Allah who has said the following: “The salvation of a believer is in his controlling his tongue.”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī