Sunan an-Nasa'i — The Book of Purification — Hadith No: 137
Translation
It was narrated from 'Awn bin Abi Juhaifah that his father said:"I saw the Prophet (ﷺ) in Al-Batha'. Bilal brought out the water left over from his Wudu' and the people rushed toward it and I got some of it. Then a short spear was planted in the ground and he led the people in prayer, while donkeys, dogs and women were passing in front of him