Chapter 1: The Book of Purification
It was narrated that Abu Hurairah said: "A Bedouin stood up and urinated in the Masjid, ans the people started shouting. The Messenger of Allah (ﷺ) said to them: 'Leave him alone, and spill a bucket of water over his urine. For you have been sent to make things easy for people, you have not been sent to make things difficult.'"
Sunan an-Nasa'i 56