مُوَطَّأُ مَالِكٍ
Muwatta Malik 665
Fasting
وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، أَنَّ سَعْدَ بْنَ أَبِي وَقَّاصٍ، وَعَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَا يَحْتَجِمَانِ وَهُمَا صَائِمَانِ .
Yahya related to me from Malik from Ibn Shihab that Sad ibn Abi Waqqas and Abdullah ibn Umar used to be cupped while they were fasting.
Arabic/English book reference: Book 18, Hadith 31