The Prophet (peace and blessings be upon him) said:
"The best of the things with which you treat yourselves is cupping (hijamah) and sea costus (qust bahri, a medicinal root)."
Hadith Referenceصحیح الجامع الصغیر / حرف الألف / 1365
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[مالك حم ق ت ن] عن أنس. مختصر مسلم ٩٣٦ نحوه.