وَ رَوَى عُمَرُ بْنُ أُذَيْنَةَ عَنْهُ عَلَيْهِ اَلسَّلاَمُ: أَنَّهُ سَأَلَهُ عَنِ اَلرَّجُلِ يَرْعُفُ وَ هُوَ فِي اَلصَّلاَةِ وَ قَدْ صَلَّى بَعْضَ صَلاَتِهِ فَقَالَ «إِنْ كَانَ اَلْمَاءُ عَنْ يَمِينِهِ أَوْ عَنْ شِمَالِهِ أَوْ عَنْ خَلْفِهِ فَلْيَغْسِلْهُ مِنْ غَيْرِ أَنْ يَلْتَفِتَ وَ لْيَبْنِ عَلَى صَلاَتِهِ فَإِنْ لَمْ يَجِدِ اَلْمَاءَ حَتَّى يَلْتَفِتَ فَلْيُعِدِ اَلصَّلاَةَ» قَالَ «وَ اَلْقَيْءُ مِثْلُ ذَلِكَ.
Umar ibn Uthayna reported from him (a.s) that he was asked about a man who experiences a nosebleed while in prayer and has already prayed part of it. Imam (a.s) replied: "If the blood is on his right, left, or behind him, he should wash it without turning and continue with his prayer. If he cannot find water without turning, then he should repeat the prayer." He also said: "Vomiting is similar to that."