Anas bin Maalik Radiyallahu 'Anhu reports:
"Sayyidina Rasulullah Sallallahu 'Alayhi Wasallam took treatment of cupping on the back of his leg at Milal (a place about seventeen miles-27 km-from Madinah Munawwarah in the direction of Makkah) while he was in the state of ihraam". (ID)
English reference (ID): Book 49, Hadith 348 (ID)
Arabic reference (ID): Book 50, Hadith 365 (ID)