Awn bin Abu Juhayfa reported,

His father reported that he saw the Messenger of Allah ﷺ in a red leather tent. He said, "I saw Bilal bring out water left from the Prophet's ablution, and I watched the people rushing toward it. Whoever managed to get some of it wiped himself with it, and whoever could not get any took from the moisture on his companion's hand."

Azami 9399

Sahih

عن عون بن أبي جحيفة

أن أباه رأى رسول الله ﷺ في قبة حمراء من أدم، ورأيت بلالا أخرج وضوءا، فرأيت الناس يبتدرون ذلك الوضوء، فمن أصاب منه شيئا تمسح به، ومن لم يصب منه شيئا أخذ من بلل يد صاحبه.

الأعظمي 9399صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Biography of the Prophet ﷺ
Chapter
Seeking blessings from the Prophet ﷺ and his relics
Section
Seeking blessings from the Prophet ﷺ and what was narrated about drinking his urine
Numbering
Jami al-Kamil 9399 (2nd edition)
Azami 9399