Asim bin al-Mundhir bin al-Zubayr relates: I entered a garden with Ubaydullah bin Abdullah bin Umar where there was a water tank in which lay the skin of a dead camel, and he performed ablution from it. I said: Are you performing ablution from it even though the skin of a dead camel is in it? He narrated to me, through his father (Ibn Umar), this hadith of the Prophet (peace and blessings be upon him): "When water is equal to two or three large jars (qullatayn), nothing makes it impure." In the narration of Hammad bin Salamah, Affan bin Muslim and others did not mention the words "or three".