Abu Sa'id al-Khudri said that some people asked God’s messenger whether they might perform ablution out of the well of Buda‘a, which was a well into which menstrual cloths, dead dogs and stinking things were thrown, and he replied, “Water is pure and is not defiled by anything.”
Ahmad, Tirmidhi, Abu Dawud and Nasa’i transmitted it.
Ibn ‘Umar said that when God’s messenger was asked about water in desert country and what is frequented by animals and wild beasts, he replied, “When there is enough water to fill two pitchers it bears no impurity.”
Ahmad, Abu Dawud, Tirmidhi, Nasa'i, Darimi and Ibn Majah transmitted it. Another version by Abu Dawud has, “It does not become unclean.”
Abu Huraira said that a man told God’s messenger that he sailed on the sea taking a small quantity of water with him. As he would suffer from thirst if he used this for ablution, he asked whether he might use sea water for that purpose, and received the reply, “Its water is pure, and what dies a natural death in it is lawful food.”
Malik, Tirmidhi, Abu Dawud, Nasa'i, Ibn Majah and Darimi transmitted it.
My maternal aunt took me to the Prophet and said, “My nephew is ill.” So he wiped my head, invoked a blessing on me, then performed ablution, and I drank some of the water he had used. Then I stood up behind his back and looked at the seal of prophecy between his shoulders, like the button on a bride’s pavilion.
