وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عَبَّاسٍ، كَانَ يَرْعُفُ فَيَخْرُجُ فَيَغْسِلُ الدَّمَ عَنْهُ ثُمَّ يَرْجِعُ فَيَبْنِي عَلَى مَا قَدْ صَلَّى ‏.‏

Yahya related to me from Malik from Nafi that Abdullah ibn Abbasused to have nose-bleeds and would leave to wash off the blood. Hewould then return and complete his prayer. Translation Not Available

Book Ref: Muwatta Imam Malik Book 2 Hadith 79
Web Ref:  Muwatta Imam Malik Book 2 Hadith 49