عن أبي سعيد الخدري رضي الله عنه أنه قيل لرسول الله ﷺ: أنتوضأ من بِئر بُضَاعَةَ وهي بئر يُطرحُ فيها الحَيضُ ولحم الكلاب والنَّتَنُ؟ فقال رسول الله ﷺ: «الماء طهور لا ينجسه شيء».
Abu Sa‘īd al-Khudri (may Allah be pleased with him) reported: The Messenger of Allah (may Allah's peace and blessings be upon him) was asked: "Can we perform ablution from the well of Budā‘ah, which is a well into which menstrual pads, dead dogs and stinky things are thrown?" He replied: "Water is pure and nothing makes it impure."
The Messenger of Allah (may Allah's peace and blessings be upon him) clarified that pure water does not become impure once impure things are thrown in it, as long as its color, taste or smell do not change.