It is narrated from Hazrat Aisha that the Prophet (peace be upon him) said: The one who applies cupping and the one to whom it is applied, both their fasts are broken.
Hadith Referenceمسند احمد / مسند النساء / 25242
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف لضعف ليث