Grief over the Prophet's death precludes adornment
Nahj al-Balāgha|Volume 1|Book 3|Chapter 473
قال السيد الرضي: يُرِيدُ وَفَاةَ رَسُولِ اللَّهِ (صلى الله عليه وآله).
as-Sayyid ar-Raḍī says: Amīr al-mu’minīn, peace be upon him, is referring to the death of the Messenger of Allāh, peace be upon him and his descendants.