About the Prohibition on Uttering his Given Name عليه السلام

Saʿd b. ʿAbd Allāh, from Muḥammad b. Aḥmad al-ʿAlawī, from Abī Hāshim al-Jaʿfarī, who narrated: “I heard Abā’l-Ḥasan al-ʿAskarī عليه السلام saying: “The successor (after me, is my son al-Ḥasan), but how will you deal with the successor after the successor?” I said: “Why? May Allāh make me your sacrifice.” He stated: “Because you will not see his person, nor will it be allowable for you to mention him by his given name.” I followed up: “So, how are we to mention him?,” whereupon he replied: “Say “the Divine authority from the House of Muḥammad,” may Allāh’s salutations be upon him, and His peace.”