Yahya related to me from Malik from Yazid ibn Abdullah Qusayt al- Laythi that he saw Said ibn al-Musayyab having a nose-bleed while praying. He went off to the room of Umm Salama, the wife of the Prophet, may Allah bless him and grant him peace, and water was brought to him and he did wudu. He then returned and completed his prayer.
Muwatta Malik Book 2, Hadith 49
← Previous Hadith Yahya related to me from Malik from Nafi that Abdullah ibn Abbas used to have nose-bleeds and would leave to wash off the blood. He would then return and complete his prayer.

Muwatta Malik Book 2, Hadith 48 Next Hadith → Yahya related to me that Abd ar-Rahman ibn Harmala al-Aslami said, "I saw Said ibn al-Musayyab with his nose bleeding and blood poured out of it so that his fingers were all red from the blood coming out of his nose, and he prayed without doing wudu."

Muwatta Malik Book 2, Hadith 50