I also heard Ishaq say: "The Sunnah has passed regarding a man who inserts his fingers into his nose, and blood comes out upon them," and he said: "As long as it is not flowing blood, there is no harm [in it]."
80 - Abu Bakr al-Humaydi narrated to us, saying: Sufyan narrated to us, saying: I heard Abu al-Zinad say: I saw Sa'id ibn al-Musayyab insert his ten fingers into his nose, then pull out blood, rub it off, then pray without performing wudu.
81 - Ishaq ibn 'Umar ibn Salit narrated to us, saying: Hammad ibn Salamah narrated to us, from Humayd, from Bakr ibn 'Abd Allah, that Ibn 'Umar squeezed a pustule on his face, and some blood and pus (qayh) came out of it, then he prayed and did not perform wudu.
82 - He said: There was a man praying before him in the mosque who had been cupped, and some blood came out from his cupping site, so he took a pebble, wiped away the blood, and then buried the pebble.
83 - Muhammad ibn Yahya ibn Abi Hazm informed us, saying: Bishr ibn 'Umar narrated to us, saying: I asked Malik ibn Anas about heavy nosebleed? He replied: "We do not consider it to require wudu." And he said: "One does not perform wudu except for a hadath (ritual impurity) that exits from the penis or the anus, or [due to] sleep, or [contact with] women."