Clipping the Moustache and the Hair in the Nose

Ahmad b. Basir narrated from Ziyad b. Marwan al-‘Abdi from Muhammad b. Sinan, from Abu ‘Abd Allah, peace be upon him, who said: ‘Amir al-Mu’minin, peace be upon him, said: “Clipping the moustache (al-sharib) every Friday is a protection against leprosy. Hair in the nose is aiso a protection from it.”’