(42) باب الْقُبَّةِ الْحَمْرَاءِ مِنْ أَدَمٍ
Narrated Abu Juhaifa:
I came to the Prophet (ﷺ) while he was inside a red leather tent, and I saw Bilal taking the remaining water of the ablution of the Prophet, and the people were taking of that water and rubbing it on their faces; and whoever could not get anything of it, would share the moisture of the hand of his companion (and then rub it on his face).
Reference: Sahih al-Bukhari 5859
In-book reference: Book 77, Hadith 76
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 7, Book 72, Hadith 750