An Arabi entered the mosque while the Messenger of Allah ﷺ was sitting, and he prayed. Ibn Abdah said, two rakahs. Then he said, "Allah, have mercy on me and on Muhammad, and do not show mercy to anyone else with us."The Prophet ﷺ said, "You have restricted something vast."Before long, the man urinated in a corner of the mosque. The people rushed toward him, but the Prophet ﷺ stopped them and said, "You were sent to make things easy, not to make things difficult. Pour a bucket of water over it," or he said, "a pail of water."
حدثنا أحمد بن عمرو بن السرح وابن عبدة في آخرين وهذا لفظ ابن عبدة أخبرنا سفيان عن الزهري عن سعيد بن المسيب
أن أعرابيا دخل المسجد ورسول الله ﷺ جالس فصلى قال ابن عبدة ركعتين ثم قال اللهم ارحمني ومحمدا ولا ترحم معنا أحدا فقال النبي ﷺ لقد تحجرت واسعا ثم لم يلبث أن بال في ناحية المسجد فأسرع الناس إليه فنهاهم النبي ﷺ وقال إنما بعثتم ميسرين ولم تبعثوا معسرين صبوا عليه سجلا من ماء أو قال ذنوبا من ماء
[Sahih] Reported by Tirmidhi, Purity, chapter on what has been said about urine touching the ground, no: 147, from the hadith of Sufyan bin Uyayna, with this wording. Humaydi also reported it, no: 944, and Ibn Jarud graded it sahih, no: 141, as did Ibn Khuzayma, no: 298. Zuhri stated explicitly that he heard it directly. Bukhari also reported it, no: 601. See the hadith that follows, numbered: 882.