Nafi, blood has overwhelmed me, so find me a cupper. Make him a gentle one if you can, and do not bring me an elderly old man or a young boy, for I heard the Messenger of Allah ﷺ say, "Cupping on an empty stomach is best. In it lies cure and blessing, and it increases intellect and memory. So perform cupping with the blessing of Allah on Thursday, and avoid cupping on Wednesday, Friday, Saturday, and Sunday deliberately. Perform cupping on Monday and Tuesday, for it is the day on which Allah relieved Zayd, I mean Ayub, from affliction, and He struck him with affliction on Wednesday. Indeed, neither leprosy nor vitiligo appears except on Wednesday or the night of Wednesday."
حدثنا سويد بن سعيد حدثنا عثمان بن مطر عن الحسن بن أبي جعفر عن محمد بن جحادة عن نافع
يا نافع قد تبيغ بي الدم فالتمس لي حجاما واجعله رفيقا إن استطعت ولا تجعله شيخا كبيرا ولا صبيا صغيرا فإني سمعت رسول الله ﷺ يقول الحجامة على الريق أمثل وفيه شفاء وبركة وتزيد في العقل وفي الحفظ فاحتجموا على بركة الله يوم الخميس واجتنبوا الحجامة يوم الأربعاء والجمعة والسبت ويوم الأحد تحريا واحتجموا يوم الاثنين والثلاثاء فإنه اليوم الذي عافى الله فيه أيوب من البلاء وضربه بالبلاء يوم الأربعاء فإنه لا يبدو جذام ولا برص إلا يوم الأربعاء أو ليلة الأربعاء
[Its chain of transmission is daif]. Ibn Adi narrated it in 2/721 from the hadith of Uthman bin Matar with similar wording, and see the previous hadith. Ghazal bin Muhammad corroborated him, as recorded by Hakim in 4/211, but he is majhul, as Dhahabi said. Abu Ali Uthman bin Jafar corroborated them both (Mustadrak 4/409), and he too is weak. Uthman bin Saeed Darimi narrated it from Abdullah bin Salih, the scribe of Layth, from Ataf bin Khalid, from Nafi, with similar wording (Mustadrak 4/211, 212), and its chain of transmission is daif because of the scribe of Layth.