Mughira bin Shuba reported,

I was with the Prophet ﷺ on a journey when he said, "Mughirah, take the water vessel."So I took it, and the Messenger of Allah ﷺ went off until he was hidden from my sight and relieved himself. He was wearing a Syrian cloak, and when he tried to pull his hand out through its sleeve, it was too narrow, so he drew his hand out from underneath. I then poured water for him, and he performed the ablution as he would for prayer, wiped over his leather socks, and then prayed.

Bukhari 363

Sahih

حدثنا يحيى قال حدثنا أبو معاوية عن الأعمش عن مسلم عن مسروق

عن مغيرة بن شعبة قال

كنت مع النبي ﷺ في سفر فقال يا مغيرة خذ الإداوة فأخذتها فانطلق رسول الله ﷺ حتى توارى عني فقضى حاجته وعليه جبة شأمية فذهب ليخرج يده من كمها فضاقت فأخرج يده من أسفلها فصببت عليه فتوضأ وضوءه للصلاة ومسح على خفيه ثم صلى

البخاري 363صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Prayer
Chapter
Prayer in the Syrian cloak
Numbering
Darussalam 363
Bukhari 363