We used not to refrain from cupping for the fasting person except out of dislike for the exhaustion it causes.
حدثنا عبد الله بن مسلمة حدثنا سليمان يعني ابن المغيرة عن ثابت قال
ما كنا ندع الحجامة للصائم إلا كراهية الجهد
No references are available.
[Its isnad is sahih] Bukhari narrated it, no. 1940, from the hadith of Thabit, through him, but with different wording than this.