Al-Kāfi
Hadith 39121ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ مُحَمَّدِ بْنِ الْحُسَيْنِ عَنْ عَلِيِّ بْنِ الْحَسَنِ بْنِ رِبَاطٍ عَنْ بَعْضِ رِجَالِهِ عَنْ أَبِي عَبْدِ الله (عَلَيهِ السَّلام) قَالَ لا يَزَالُ الْعَبْدُ الْمُؤْمِنُ يُكْتَبُ مُحْسِناً مَا دَامَ سَاكِتاً فَإِذَا تَكَلَّمَ كُتِبَ مُحْسِناً أَوْ مُسِيئاً.
21. Muhammad ibn Yahya has narrated from Muhammad ibn al-Husayn from Ali ibn al-Hassan ibn Ribat from certain individuals of his people from Abu ‘Abdillah (a.s.) who has said the following: “A believing servant (of Allah) is considered a person of good deeds as long as he does not speak. When he speaks he is considered a person of good deeds or of evil deeds.”