Hadith.1105 - The Commander of the Faithful Imam Ali ibn Abi Talib عليه السلام said:
"None of you should pray behind a person with a mutilated limb (al-ajdham), a person with leprosy (al-abrāṣ), a person with a mental disorder (al-majnūn), a person who has been subjected to a legal punishment (al-maḥdūd), the child of adultery (walad al-zina), or a Bedouin (al-a‘rābī) leading a migrant (al-muhājir)."