"[Quran 9:108] and there is one verse which concerned with Taharah or purity and impurity of Humans: "O you who have believed, indeed the polytheists are unclean, so let them not approach al-Masjid al-Haram after this, their [final] year.
[2] Some scholars such as Mohsen Fayz Kashani (d. 1680) and Sulayman ibn Abdullah Mahuzi (d. 1708) did not believe in the impurity of non-believers, and particularly non-People of the Book.
[6] Personal grooming is also a matter of focus in Islam, and comprises all the ritual purity practices of prophets known as fitra.
[citation needed] Keeping oral hygiene through cleaning the teeth with the use of a form of toothbrush called miswak is considered sunnah, the way of Muhammad.
Ritual ablution is also very important, as observed by the practices of wudu, ghusl, and tayammum (water-free alternative using any natural surface such as rock, sand, or dust).
The common Muslims practice of taking off shoes when entering mosques and homes is also based on ritual cleanliness.
[11][12] Issues of laterality, such as whether one uses the left or right hand and the foot used to step into or out of toilet areas, are derived from hadith sources.
Ibn Abidin, a 13th century Hanafi Islamic scholar explains:[15] When there is discharge of thick, cloudy white fluid (wady) (that exits before or after urinating) or unlustful discharge of thin, sticky, white fluid (madhy) caused by play or kissing, it requires washing the private parts and wudu.Regarding things that necessitates ghusl: After partaking in sexual activity where penetration or ejaculation occurs, both men and women are required to complete a full-body ritual ablution known as ghusl in order to re-establish ritual purity before prayer.
[17] Ghusl requires clean, odorless water that has not been used for a previous ritual and begins with the declaration of the intention of purity and worship.