(40) باب اسْتِعْمَالِ فَضْلِ وَضُوءِ النَّاسِ
Narrated Abu Juhaifa:
Allah's Messenger (ﷺ) came to us at noon and water for ablution was brought to him. After he had performed ablution, the remaining water was taken by the people and they started smearing their bodies with it (as a blessed thing). The Prophet (ﷺ) offered two rak`at of the Zuhr prayer and then two rak`at of the `Asr prayer while a short spear (or stick) was there (as a Sutra) in front of him.
Reference: Sahih al-Bukhari 187
In-book reference: Book 4, Hadith 53
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 4, Hadith 187