It is narrated from Yahya bin Saeed Al-Ansari that a Bedouin came to the mosque and uncovered his private part to urinate, so the people made a commotion and shouted loudly. Then the Messenger of Allah, peace and blessings be upon him, said: "Leave him." So the people left him. When he had finished urinating, the Prophet, peace and blessings be upon him, ordered that a bucket of water be poured over that place.

It is narrated from Abdullah bin Dinar that I saw Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) urinating while standing.

Imam Malik, may Allah have mercy on him, was asked: Is there any hadith regarding performing istinja with water after urination or defecation? He replied: It has reached me from some of the Salaf that they used to perform istinja with water after defecation, and I consider it good to perform istinja with water after urination.