The people asked the Messenger of Allah (ﷺ): Can we perform ablution out of the well of Buda'ah, which is a well into which menstrual clothes, dead dogs and stinking things were thrown? He replied: Water is pure and is not defiled by anything.
Reference: Sunan Abi Dawud 66 In-book : Book 1, Hadith 66 English translation : Book 1, Hadith 66
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