It was narrated that Anas bin Malik said:

"A Bedouin urinated in the Masjid, and the Prophet ﷺ ordered that a bucket (be brought) and poured over it."

أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا عَبِيدَةُ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ أَنَسٍ، قَالَ بَالَ أَعْرَابِيٌّ فِي الْمَسْجِدِ فَأَمَرَ النَّبِيُّ ﷺ بِدَلْوٍ مِنْ مَاءٍ فَصُبَّ عَلَيْهِ .