Purification (Kitab Al-Taharah)
Dawud :: Book 1 : Hadith 185
Narrated AbuSa'id al-Khudri:
The Prophet (peace_be_upon_him) passed by a boy who was skinning a goat. The Messenger of Allah (peace_be_upon_him) said: Give it up until I show you. He (the Prophet) inserted his hand between the skin and the flesh until it reached the armpit. He then went away and led the people in prayer and he did not perform ablution. The version of Amr added that he did not touch water.