When one of you breaks his wudu during prayer, let him hold his nose, leave and perform wudu, and everyone who gives fatwas based on legal stratagems has used it as evidence

Sayyidah Aishah (may Allah be pleased with her) narrates that the Messenger of Allah (peace and blessings be upon him) said: "When the ablution of one of you is broken during his prayer, let him hold his nose and withdraw from there."
This hadith is sahih (authentic) on the condition of Imam Bukhari and Imam Muslim, but the two Shaykhs did not record it.

It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) said: "When one of you experiences something that breaks ablution (passing wind and the like) during his prayer, let him hold his nose, turn away, and perform ablution."

Imam al-Daraqutni says: I heard Abu Bakr al-Shafi'i al-Sayrafi say: Whoever among the Imams of the Muslims has given a fatwa about (legitimate) legal stratagems (hiyal) took it from this very hadith.

Sayyiduna Abd al-Rahman bin Hasanah (may Allah be pleased with him) narrates: Amr bin al-As (may Allah be pleased with him) and I went out, and the Messenger of Allah (peace and blessings be upon him) came out to us with a shield in his hand. He (peace and blessings be upon him) screened himself with it and urinated sitting down. I said to my companion: "Look at the Messenger of Allah (peace and blessings be upon him), how he is urinating (sitting) like women do!" He (peace and blessings be upon him) came to us and said: "Do you not know what befell a man of the Children of Israel? When a drop of urine fell on any of them, he would cut it off with shears. He forbade them from that, so he was punished in his grave."

Sayyiduna Abd al-Rahman bin Hasanah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) urinated sitting behind the cover of a shield. The people said: "Do you urinate (sitting) in this way, as a woman does?" The Messenger of Allah (peace and blessings be upon him) said: "Among the Children of Israel, when a drop of urine fell on any of them, they would cut it off with shears; and their scholar forbade them from that, so he was punished in his grave."
This hadith has an authentic chain (sahih al-isnad) and is on the condition of the two Shaykhs, but they did not record it with these words.

Sayyidah Aishah (may Allah be pleased with her) narrates that from the time the Qur'an was revealed to the Messenger of Allah (peace and blessings be upon him), he (peace and blessings be upon him) never urinated standing.

Al-Miqdam bin Shurayh narrates from his father that he heard Sayyidah Aishah (may Allah be pleased with her) swearing by Allah that from the time the Qur'an was revealed to the Messenger of Allah (peace and blessings be upon him), no one saw him (peace and blessings be upon him) urinating standing.
This hadith is sahih (authentic) on the condition of Imam Bukhari and Imam Muslim, but the two Shaykhs did not record it. In my view, they left it because this narration of Sayyidah Aishah apparently conflicted with the narration of Sayyiduna Hudhayfah in which it is established that he (peace and blessings be upon him) urinated standing. And Allah knows best.

Sayyiduna Umar (may Allah be pleased with him) narrates: The Messenger of Allah (peace and blessings be upon him) saw me urinating standing and said: "O Umar! Do not urinate standing." After that I never urinated standing.