The description of the well of Buda'ah

Imam al-Shafi'i (may Allah have mercy on him) says: The hadith of the well of Buda'ah, in which it is stated that the well of Buda'ah had a great deal of deep water, and filth used to be thrown into it which did not change its colour or taste, nor did any foul smell appear in it. It was said to the Prophet (peace and blessings be upon him): You perform ablution from the well of Buda'ah although such and such things are thrown into it? The Prophet (peace and blessings be upon him) said in reply: "Nothing makes water impure." From this it became clear that this applied to water in the same condition as that about which he (peace and blessings be upon him) gave the answer.

Qutaybah bin Sa'id (may Allah have mercy on him) says that I asked the caretaker of the well of Buda'ah about its depth, and he said: At most the water in it reaches the pubic region. I said: And when it decreases? He said: Below the private parts. Imam Abu Dawud (may Allah have mercy on him) says: I estimated the well of Buda'ah with my cloak; I spread it over it and then measured it, and its width was six cubits. I asked the man who had opened the gate of the garden for me and let me in: Has its structure been changed from what it was before? He said: No. I saw water in it whose colour had changed.