Al-Kāfi

Hadith 333
modestysilencechastity
2ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنِ ابْنِ مُسْكَانَ عَنِ الْحَسَنِ الصَّيْقَلِ قَالَ قَالَ أَبُو عَبْدِ الله (عَلَيهِ السَّلام) الْحَيَاءُ وَالْعَفَافُ وَالْعِيُّ أَعْنِي عِيَّ اللِّسَانِ لا عِيَّ الْقَلْبِ مِنَ الإيمَانِ.
2. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from Muhammad ibn Sinan from ibn Muskan from al-Hassan al-Sayqal from Abu ‘Abdillah (a.s.) who has said the following: “Abu ‘Abd Allah (a.s.) has said, ‘Bashfulness, chastity, tiredness of tongue (to shun speaking useless things), not tiredness of the heart, are from belief.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī