The Prophet ﷺ used to be cupped on the crown of his head and between his shoulders, and he would say, "Whoever lets out some of this blood, it will not harm him if he does not seek any other remedy for any ailment."
أن النبي ﷺ كان يحتجم على هامته وبين كتفيه وهو يقول: من أهراق من هذه الدماء فلا يضره أن لا يتداوى بشيء لشيء.
This was narrated by Abu Dawud (3859) and Ibn Majah (3484), both through Walid bin Muslim, who said, Ibn Thawban told us, from his father, from Abu Kabsha Anmari, and he related it. Its chain of transmission is hasan because of Ibn Thawban, who is Abdul-Rahman bin Thabit bin Thawban, for he is hasan al-hadith. As for his father, Thabit bin Thawban Ansi, scholars have stated clearly that he did not meet Abu Hurairah, but they did not state that he never heard from Abu Kabsha, nor did they specify the year of his death, so it appears likely that he did hear from him.As for what is reported from Kabsha bint Abu Bakra, that her father used to forbid his family from cupping on Tuesday, claiming it was from the Messenger of Allah ﷺ, "Tuesday is the day of blood, and in it there is an hour when blood does not stop flowing," its chain of transmission is daif. This was narrated by Abu Dawud (3862), by Aqeeli in the entry on Bakkar bin Abdul-Aziz in his book on weak narrators (150/1), and by Bayhaqi (9/340), all of them through the report of Musa bin Ismail, who said, Abu Bakra Bakkar bin Abdul-Aziz informed me, my paternal aunt Kabsha bint Abu Bakra informed me, and she related it. Abu Dawud said, others besides Musa said Kaysa bint Abu Bakra. Kabsha bint Abu Bakra's status is unknown, and Bakkar bin Abdul-Aziz is disputed, and even though he is hasan al-hadith, his sole transmission cannot be relied upon. Bayhaqi said, "The prohibition mentioned in it stops at the companion, and its chain of transmission is not strong. And Allah knows best."Likewise, what is reported from Ibn Umar is not sound, that he said, "O Nafi, my blood has become agitated, so find me a cupper, and make him gentle if you can, and do not make him an old man, nor a young boy, for I heard the Messenger of Allah ﷺ say, 'Cupping on an empty stomach is best, and in it there is healing and blessing, and it increases the intellect and the memory, so seek cupping upon the blessing of Allah on Thursday, and avoid cupping on Wednesday, Friday, Saturday, and Sunday, as a precaution, and undergo cupping on Monday and Tuesday, for that is the day on which Allah cured Ayub of his affliction, and He struck him with affliction on Wednesday, for leprosy and vitiligo appear only on Wednesday or the night of Wednesday.'" This was narrated by Ibn Majah (3487) from Suwayd bin Saeed, who said, Uthman bin Matar told us, from Hasan bin Abu Jafar, from Muhammad bin Jahada, from Nafi, from Ibn Umar, and he related it. Hasan bin Abu Jafar Jufri Basri is daif by the agreement of the scholars, despite his devotion and virtue.Hakim also narrated it (409/4), saying, from Uthman bin Jafar, Muhammad bin Jahada told us, from Nafi, with the same chain, similarly. Hakim said, "The narrators of this hadith are all trustworthy except this Uthman bin Jafar, for I do not know him to be either reliable or discredited." It appears this is a mistake by Hakim, and the correct name is Hasan bin Abu Jafar, and for this reason Dhahabi followed up on it, saying, "This one was mentioned before, and he is weak."Ibn Majah also narrated it (3488) through another route, saying, Muhammad bin Musaffa Himsi told us, Uthman bin Abdul-Rahman told us, Abdullah bin Isma told us, from Saeed bin Maymun, from Nafi, who said, Ibn Umar said, "O Nafi, my blood has become agitated, so bring me a cupper, and make him a young man, and do not make him an old man, nor a boy." He said, and Ibn Umar said, I heard the Messenger of Allah ﷺ say, "Cupping on an empty stomach is best, and it increases the intellect, and increases the memory, and increases the one who memorizes in his memorization, so whoever wishes to be cupped, let it be on Thursday, in the name of Allah, and avoid cupping on Friday, Saturday, and Sunday, and undergo cupping on Monday and Tuesday, and avoid cupping on Wednesday, for that is the day on which Ayub was struck with affliction, and leprosy and vitiligo appear only on Wednesday or the night of Wednesday." In this chain, Uthman bin Abdul-Rahman and his teacher Abdullah bin Isma are both unknown. It has other routes, but they only add to its weakness, and the hadith is rejected, as Hakim, Dhahabi, and others have said.Likewise, what is reported from Abu Hurairah as a saying of the Prophet is not sound, "Whoever gets cupped on Wednesday or Saturday and then notices white patches on his skin should blame no one but himself." This was narrated by Hakim (409/4) from Abu Bakr bin Ishaq, who said, Abu Muslim informed us, Hajjaj bin Minhal told us, Hammad bin Salama told us, from Sulayman bin Arqam, from Suddi, from Saeed bin Musayab, from Abu Hurairah, and he related it. In this chain, Sulayman bin Arqam is an abandoned narrator. There are other hadiths with the same meaning, but all of them are defective.As for the time of cupping, it is permissible to be cupped at any time. For this reason, Bukhari titled a chapter, "What hour one may be cupped, and Abu Musa was cupped at night." Hafiz said in Fath al-Bari (149/10), "Hadiths have come regarding times suitable for cupping, but none of them meet his criteria, so it seems he was indicating that it should be done according to need, and is not restricted to one time over another." He also said, since none of these hadiths is sahih, Hanbal bin Ishaq said, Ahmad used to get cupped whenever his blood became agitated, at whatever hour that happened to be.As for what is reported in the hadith of Abu Hurairah, "Whoever gets cupped on the seventeenth, the nineteenth, or the twenty-first will have a cure for every ailment," this should be understood as referring to one who has made it a habit, whether he needs it or not.Cupping is the extraction of blood from beneath the skin. In hot countries, cupping is among the most beneficial treatments, because of the frequent agitation of blood there, and it should be done at the site that the condition requires. The skilled cupper knows this, and cupping has etiquettes and rules that must be observed.