About the Prohibition on Uttering his Given Name عليه السلام

Saʿd b. ʿAbd Allāh, from Jaʿfar b. Muḥammad b. Mālik, from ʿAlī b. al-Ḥasan b. Faḍḍāl from al-Rayyān b. al-Ṣalt, who narrated: “Al-Riḍā عليه السلام was asked about the Qāʾim عليه السلام, so he said: “He is not (to be) physically seen, nor mentioned by his given name.”