On Rare Traditions From al-Ridha About Various Issues
ʿUyūn akhbār al-Riḍā|Volume 1|Book 2|Chapter 26
23 - وَبِهذَا الإسناد قالَ: قالَ الرِّضا عَلَيْهِ السَّلامُ: الحَياءُ مِنَ الإِيمان.
26-23 According to the same documentation, on the authority of Al-Ridha صلى الله عليه وعلى آله وسلم, “Being shy is due to faith.”