In addition to the cleanliness and taharah of garments and body...
In addition to the cleanliness and taharah of garments and body, a Muslim must also be well-dressed and must meet the people with the best possible appearance and looks.
Al-'Imam 'Ali (AS) states: "Put on beautiful clothes and dress yourself up, for Allah is good and likes the good things, but these should be religiously lawful." Then, al-'Imam 'Ali (AS) reads the following verse: "Say: Who has prohibited the embellishment of Allah which He has brought forth for His servants and the good provisions...(7:32)?" Gargling with Water and Brushing the Teeth: Being a channel for food, the mouth of man gets contaminated due to eating food.
Food particles remain in the roots of the teeth, on the tongue, and in all other parts of the mouth thus rendering the mouth contaminated and malodorous. Sometimes, as a result of fermentations and chemical actions and reactions that take place in food particles , poisonous matters are formed which get mixed with the food and then enter the stomach. Moreover, the breath of such a person in a gathering pollutes the air and annoys other people.
Therefore, the holy religion of Islam has ordered the Muslims to brush their teeth everyday (especially before each wudu') gargle their mouth with pure water, and clean their mouth from contamination.
The Holy Prophet (SA) states: "If it were not for the fear of hardship and indigence, I would have made brushing the teeth wajib upon Muslims." Elsewhere, the Holy Prophet (SA) states: "Jibril always recommended brushing the teeth to an extent that I even imagined it would become incumbent upon the Muslims later on." Breathing: Breathing is one of the essential needs of man in his life. Quite often, the current of air surrounding man's residential area is not without dust and dirt.
Surely, breathing such an air is harmful for the respiratory system. To protect against this harm, the Compassionate Allah has provided hair inside man's nose. This hair prevents the entrance of dust and dirt into the lungs. Nevertheless, sometimes the hair of the nose cannot fully perform its function because of the accumulation of dirt and dust in the nose.
For this reason, Islam has issued orders for Muslims to inhale water several times a day while having wudu' so as to protect the health of their respiratory system by inhaling clean water through their nostrils.