وَعَنِ الْبُخَارِيِّ تَعْلِيقًا
قَالَ: كَانَ ابْنُ عُمَرَ يَحْتَجِمُ وَهُوَ صَائِمٌ ثُمَّ تَرَكَهُ فَكَانَ يَحْتَجِمُ بِاللَّيْلِ
Bukhari said without a complete isnad that Ibn Umar used to have himself cupped whan he was fasting. Then he abandoned it and had himself cupped at night.
Mishkat al-Masabih 1927, Book 8, Fasting, Hadith 61. 1 min read