Sayyiduna Anas bin Malik (may Allah be pleased with him) said: A Bedouin came to the Prophet (peace and blessings be upon him). He finished what he needed and then stood in a corner of the mosque and urinated. The Companions (may Allah be pleased with them) wanted to stop him, but the Prophet (peace and blessings be upon him) forbade them. Then he (peace and blessings be upon him) had a bucket of water brought and poured it over that urine.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4234
Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that a Bedouin urinated in the mosque. The people rushed towards him (to stop him), but the Prophet (peace and blessings be upon him) forbade them and said: "Pour a bucket of water over it."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4235
Sayyiduna Anas (may Allah be pleased with him) said: A Bedouin urinated in the mosque, and some people rose towards him. He (peace and blessings be upon him) said: "Do not stop him." Then he (peace and blessings be upon him) had a bucket of water brought and poured it over it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4237
Anas bin Malik (may Allah be pleased with him) said: I saw a Bedouin urinating in the mosque, and the Prophet (peace and blessings be upon him) said: "Leave him." When he had finished, he (peace and blessings be upon him) had water brought and poured it over it.
(b) In another narration: He (peace and blessings be upon him) ordered one of the people, who brought a bucket of water, and he (peace and blessings be upon him) poured it over it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4238
Sayyiduna Abu Hurayrah (may Allah be pleased with him) said: A Bedouin stood up in the mosque and urinated, and the people seized him. He (peace and blessings be upon him) said: "Leave him, and pour a bucket of water over his urine, for you have been sent to make things easy, not to make them difficult."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4239
It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that a Bedouin entered the mosque while the Prophet (peace and blessings be upon him) was seated. He prayed two rak'ahs and then said: "O Allah, have mercy on me and on Muhammad (peace and blessings be upon him), and do not have mercy on anyone besides us." The Prophet (peace and blessings be upon him) said: "You have restricted something vast." Shortly afterwards he urinated in the mosque, and the people rushed towards him. He (peace and blessings be upon him) forbade them and said: "Pour a bucket of water over it. You have been sent to make things easy, not to make them difficult."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4240
Abdullah bin Ma'qil bin Muqarrin (may Allah have mercy on him) said: In this same incident, a Bedouin prayed with the Prophet (peace and blessings be upon him), and the Prophet (peace and blessings be upon him) said: "Take up the soil on which he urinated and throw it away, then pour water over that place."
Abu Dawud said: It is mursal; Ibn Ma'qil did not meet the Prophet (peace and blessings be upon him). This has also been narrated in the hadith of Sayyiduna Ibn Mas'ud (may Allah be pleased with him), but it is not sahih (authentic).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4242