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
It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) never urinated while standing from the time the Qur'an was revealed to him (peace and blessings be upon him).
(b) In the narration of Husayn bin Hafs it is: since Surah al-Furqan was revealed. Some say the words are "the Qur'an or al-Furqan".
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 491
Al-Miqdam bin Shurayh narrates from his father: I heard Sayyidah Aishah (may Allah be pleased with her) swearing by Allah that no one ever saw the Messenger of Allah (peace and blessings be upon him) urinating while standing since the Qur'an was revealed to him (peace and blessings be upon him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 492
Sayyiduna Umar (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) saw me urinating while standing and said: "O Umar, do not urinate standing." After that I never urinated standing.
(b) Abd al-Karim bin Abi al-Mukhariq is da'if (weak).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 493
It is narrated from Abdullah bin Dinar that he saw Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) urinating while standing.
(b) We have narrated here reports of urinating while standing from Sayyiduna Umar, Ali, Sahl bin Sa'd and Anas bin Malik (may Allah be pleased with them).
This weakens the hadith of Abd al-Karim.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 494
Sa'id bin Amr bin Sa'id (may Allah have mercy on him) said that Sayyiduna Umar (may Allah be pleased with him) said: Urinating while standing gives better protection to the rear (from illness).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 495
Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) said that the Prophet (peace and blessings be upon him) forbade urinating while standing.
Its narrator Adi bin al-Fadl is da'if (weak).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 496