Sayyiduna Wathilah bin al-Asqa' (may Allah be pleased with him) says: We were with the Messenger of Allah (peace and blessings be upon him) when a Bedouin came in and said: "O Allah, have mercy on me and on Muhammad, and do not have mercy on anyone else along with us." The people said to him: "Woe to you! You have narrowed something vast." Then the Bedouin moved aside and began urinating standing up, and the people rushed at him. The Prophet (peace and blessings be upon him) said: "Leave him until he finishes his urinating." Then the Messenger of Allah (peace and blessings be upon him) called for a bucket of water and poured it over his urine.
Hadith Referenceالمعجم الكبير للطبراني / باب الواو / 18412