Silsilat al-Ahadith al-Sahihah

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: Nafi‘! There is heat in my blood, so find a cupping practitioner for me. Try to find one who is gentle and not a child. I heard the Noble Prophet (peace and blessings be upon him) say: "Cupping in the forenoon is best; in it is healing and blessing, and it increases intellect and memory. Get cupped in the name of Allah on Thursday. Avoid getting cupped on Wednesday, Friday, Saturday, and Sunday. Get cupped on Monday and Tuesday, for Allah the Exalted cured Ayub (peace be upon him) of his illness on that day, and on Wednesday He afflicted him with trial. Leprosy and leukoderma also appear only on Wednesday or its night."