Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) said: I was with the Prophet (peace and blessings be upon him) on a journey, and he (peace and blessings be upon him) said: "O Mughirah, take the water vessel." I took it and went out with him (peace and blessings be upon him). The Messenger of Allah (peace and blessings be upon him) walked on until he was hidden from me and relieved himself. Then he came back, and he (peace and blessings be upon him) was wearing a Syrian cloak with narrow sleeves. He (peace and blessings be upon him) tried to bring his hand out of its sleeve, but it was too narrow, so he (peace and blessings be upon him) brought his hand out from underneath it. I poured water for him (peace and blessings be upon him), and he (peace and blessings be upon him) performed ablution like the ablution for prayer and wiped over his leather socks, then he prayed.
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 18068