Abd al-Rahman bin Hasanah (may Allah be pleased with him) said: Amr bin al-As (may Allah be pleased with him) and I were sitting when the Messenger of Allah (peace and blessings be upon him) came out to us, and he (peace and blessings be upon him) had a leather shield in his hand. He (peace and blessings be upon him) urinated while sitting. We talked among ourselves and said: He is urinating the way a woman urinates. So he (peace and blessings be upon him) came back to us and said: "Do you not know what befell the man of Banu Isra'il? When urine got on them, they would cut that part away. He forbade them, so they abandoned it, and he was punished in his grave."
(b) Ibn Uyaynah and others added these words: He screened himself with it and urinated while sitting.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 490