The clean water which is boiled and cooled down in Islamic medicine is called Faater. (Not very hot and not very cool)
?According to Ahadith Faater water has many benefits especially if you drink it first thing in the morning or for Iftaar.
? Imam Sadiq quotes from the holy Prophet that Faater water
?purifies the tummy and liver,
?Cures the bad breath,
?strengthens the teeth and eyes,
?improves the vision
?cools down the exited veins
?removes the bitter taste,
?reduces the phlegm,
?cools down the heat of the tummy,
?cures the headache and etc.
? Bihar Al-Anwar, vil.16, page 242