Musnad Ahmad

Asim bin Mundhir says that once we were practicing archery in our or Ubaidullah bin Abdullah’s garden when the time for prayer came. Ubaidullah stood up and went to the pond in the garden, where a camel’s skin was lying in the water. He began to perform ablution with that water. I said to him, “Are you performing ablution with this water while this skin is also lying in it?” He replied, “My father told me this hadith: The Prophet (peace be upon him) said, ‘When water is two or three pitchers full, it does not become impure.’”