Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) said: Fever is from the heat of Hell, so cool it with water.

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) said: When you feel fever, eliminate its effect with cold water.

Sayyiduna Rafi’ bin Khadij (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Fever is the boiling of Hell, so remove its effect with water.

Sayyiduna Abu Basheer Ansari (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings be upon him) something similar to this.

Abu Hamzah (may Allah have mercy on him) narrates: I used to keep people away from Sayyiduna Ibn Abbas (may Allah be pleased with them both). Once, I could not go for a few days. Later, when I went, he said: What kept you from coming to me? I said: I was afflicted with fever. He said: Indeed, the Noble Prophet (peace and blessings be upon him) said: Fever is from the steam of Hellfire, so cool it with the water of Zamzam.

Lady Aisha (may Allah be pleased with her) narrates that the Noble Prophet (peace and blessings be upon him) said: "The severity of fever is from the steam of Hell, so cool it with water."

Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates that fever sought permission from the Noble Prophet (peace and blessings be upon him). He asked: Who is this? Fever replied: I am Umm-e-Mildam. The Prophet (peace and blessings be upon him) ordered it to go to the people of Quba. Then only Allah knows what hardship befell them because of it. They complained to the Prophet (peace and blessings be upon him). He said: What do you want? If you wish, I will supplicate to Allah Almighty for you, and He will remove it from you. And if you wish, let it be a means of purification from your sins (then do so). They said: O Messenger of Allah! Does it really cleanse sins? He (peace and blessings be upon him) replied: Yes. They said: Then let it remain here.

It is narrated from Sayyida Asma’ (may Allah be pleased with her) that when a woman was brought to her so that she might supplicate for relief from fever, she would pour water into the woman’s garment and would say that the Noble Prophet (peace and blessings be upon him) commanded us to cool fever with water, and he (peace and blessings be upon him) said: Verily, it is from the steam of Hell.

Sayyiduna Abu Umamah (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: Fever is from the furnace of Hell; the amount of fever a believer experiences will be the same amount less for him from the fire, meaning that much reduction for him in the fire of Hell.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates that the Noble Prophet (peace and blessings be upon him) used to instruct us to recite this supplication for fever and other bodily pains: BISMILLAHIL KABE , A’UDHU BILLAAHI MIN ARRI ‘IRQIN NA’AAR, WA MIN ARRI HARRIN NAAR (In the name of Allah, the Most Great, I seek refuge with Allah from the evil of the gushing vein and from the evil of the heat of the Fire).