The Book of Asceticism · Hadith 13 (#Ḥadīth #10)
Chapter 1 | On silence Except when Speaking what is Good, Abandonment of what does not concern one, and Slander
الحسن بن محبوب عن علي بن رئاب عن أبي عبيدة الحذاء عن أبي عبد الله عليه السلام قال: الحياء من الايمان والايمان في الجنة والبذاء من الجفاء والجفاء في النار.
10.Al-Ḥasan ibn Maḥbūb narrated from ʿAlī ibn Riʾāb, from Abū ʿUbaydah al-Ḥadhdhāʾ[1], from Abū ʿAbdillāh who said, “Modesty is part of faith, and faith leads one into Paradise. Immodesty is part of depravity, and depravity leads one into the Fire.”
Gradings are classical jarḥ-wa-taʿdīl, name-matched to a rijāl index (not individually re-verified).