The Prophet of Allah, peace and blessings of Allah be upon him said :
" Cleanliness is equal to half the faith and saying: Praise be to Allah (i.e. Alhamdu Lillah) makes the scale of good works outweigh. The utterance of 'Subhan Allah' (Glorified is Allah!) and 'Alhamdu Lillah' (Praise be to Allah!) fill the space between the heavens and the earth (with blessings). Salat (prayer) is light, alms giving is a proof (of one's faith), and to be steadfast is as good as light, and the Holy Qur'an is a plea in your favour or against you (as the case may be). Everyone begins his morning ready to bargain with his soul as a stake and frees it or loses it"” (Muslim).
* Maintaining purification is an act that leads to acceptance of supplication. The Noble Prophet peace and blessings of Allah be upon him said:
"If a Muslim sleeps while he is pure (having performed ablution) then when he wakes up during night he mentions the name of Allah and asks Allah anything of the good things in this life and the Hereafter, Allah will surely give him what he asked" (Ahmad & Tabrani).
* It is one of the qualities of true nature. The Prophet peace and blessings of Allah be upon him said:
"Ten acts are demands of true nature, namely: clipping the moustache, letting the beard grow, brushing the teeth with Miswak, snuffing up water in the nose, clipping the nails, washing the finger joints, plucking the hair under the armpits, shaving the pubes, and cleaning the private parts with water (after call of nature) The narrator said: I have forgotten the tenth, but it may have been rinsing the mouth" (Muslim).
Ibn 'Abbaas said: "The Prophet (peace and blessings
of Allaah be upon him) passed by one of the gardens of
Madeenah, and heard the sound of two men being punished in
their graves. The Prophet (peace and blessings of Allaah be
upon him) said: "They are being punished, but they are
not being punished for any major sin. One of them used not
to clean himself properly after urinating, and the other
used to spread malicious gossip." (Reported by al-Bukhaari;
see Fath al-Baari, 1/317). Indeed, the Prophet (peace and
blessings of Allaah be upon him) said that "most of the
punishment of the grave will be because of urine."
(Reported by Imaam Ahmad, 2/326; see also Saheeh al-Jaami',