“The Messenger of Allah (ﷺ) was asked about water and how some animals and carnivorous beasts might drink from it. He said: ‘If the water is more than two Qullahs, it will not carry filth.'” It comes with some explanation in Sunan At Timidhi ‘Abdah (one of the narrators) said: “Muhammad bin Ishaq said: ‘A Qullah refers to Jirar (These are two nouns describing large casks that are used to hold water), and a Qullah is the thing that drinking water is held in.”‘ At-Tirmidhi said: “This is the saying of Ash Shafa’i, Ahmad and Ishaq. They say that when the water is two Qullahs then nothing makes it impure, as long as it does not change its smell, and its taste. And they say, it is approximately fifty Qirbahs (waterskins).”
That Abu Hurairah used to lead them in prayer, and he said the takbir when he went down and came up. When he had finished he said: ‘By Allah (SWT), I am the one among you whose prayer most closely resembles that of the Messenger of Allah (ﷺ).'”
They prayed behind Abu Hurairah, may Allah (SWT) be pleased with him, and he when he bowed, he said the Takbir, when he raised his head he said: ‘Sami Allahu liman hamidah, Rabbana wa lakal-hamd. Then he prostrated and said the takbir, then he raised his head and said the takbir, then he said the takbir when he stood up following that Rak’ah. Then he said: ‘By the One in Whose Hand is my soul, I am the one among you whose prayer most closely resembles that of the Messenger of Allah (ﷺ). And this is how he continued to pray until he left this world.”
(Another chain) from Abdullah bin Umar from the Prophet which is similar
“ Swear by the One Who sent the Torah (Tawrah) down to Musa.”