قال السيّد الشريف : الْوَذَحَةُ : الخُنْفُسَاءُ. وهذا القول يومىءُ به إلى الحجاج، وله مع الوذحة حديث ليس هذا موضع ذكره.
as-Sayyid ar-Raḍī says: “al-Wadhāḥah” means “al-khunfusā' (dung-beetle).” In this sentence Amir al-mu'minin has referred to al-Ḥajjāj ibn Yūsuf ath-Thaqafī and he had an incident with “al-khunfusā'”, which need not be related here. [1]
[1] The detail of this incident is that one day al-Ḥajjāj stood up for saying prayers when a dung-beetle advanced towards him. al-Ḥajjāj held out his hand to stop him but he bit him whereby his hand got swollen and eventually he died of it.
Ibn Abi’l-Ḥadīd has written that “al-Wadhāḥah” means the dung that remains sticking to the tail of an animal, and this surname is intended to disgrace him.