An Arabi urinated in the mosque, so the Prophet ﷺ ordered a bucket of water to be poured over it.
أخبرنا قتيبة قال حدثنا عبيدة عن يحيى بن سعيد
بال أعرابي في المسجد فأمر النبي ﷺ بدلو من ماء فصب عليه
Agreed upon. Bukhari narrated it in the Book of Wudu, the chapter on pouring water over urine in the masjid, hadith (221), and Muslim narrated it in the Book of Purification, the chapter on the obligation of washing away urine and other impurities, etc., hadith (284), from the hadith of Yahya Ansari, with the same wording. It is also in al-Kubra, hadith (52).Ubayda is Ibn Humayd, as stated in Tuhfat Ashraf 1/428, hadith (1657).