It is narrated from Sayyiduna Hudhayfah (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) came to the refuse heap (rubbish dump) of some people in Madinah. He (peace and blessings be upon him) urinated standing, then called for water, performed ablution and wiped over his leather socks.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 1300