Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates: The Noble Prophet (peace and blessings be upon him) said: "When a person is performing prayer and he has a nosebleed or vomits, he should place his hand over his mouth and look among those present for the best among them and appoint him forward, then he should go and perform ablution and return to resume his prayer from where he left off, provided he has not spoken in between. If he has spoken in between, then he must start the prayer anew."