Volume 1, Book 4, Number 224:
Narrated Hudhaifa:
Once the Prophet went to the dumps of some people and passed urine while standing. He then
asked for water and so I brought it to him and he performed ablution.
Volume 1, Book 4, Number 225:
Narrated Hudhaifa’:
The Prophet and I walked till we reached the dumps of some people. He stood, as any one of you
stands, behind a wall and urinated. I went away, but he beckoned me to come. So I approached him
and stood near his back till he finished.