The Book of Purification and its Sunnah
كتاب الطهارة وسننها
Chapter 13: Urinating while standing
The Messenger of Allah came to the garbage dump of some people and urinated while standing up. (Hasan)Shu'bah said: "That day, 'Asim said: 'Amash reported this from Abu Wa'il, from Hudhaifah, but he did not remember it (correctly). So I asked Mansur about it, and he narrated it to me from Abu Wa'il, from Hudhaifah, that the Prophet came to a dump of some people and urinated while standing.'"
Chapter 14: Urinating while sitting
"If anyone tells you that the Messenger of Allah urinated while standing, do not believe him, for I (always) saw him urinating while sitting down."
"The Messenger of Allah saw me urinating while standing, and he said: 'O 'Umar, do not urinate standing up.' So I never urinated whilst standing after that."
"The Messenger of Allah forbade us to urinate while standing." (Da'if)I heard Muhammed bin Yazid, Abu 'Abdullah, say: "I heard Ahmad bin 'Abdur-Rahman Al-Makhzumi say: 'Sufyan Ath-Thawri said concerning the Hadith of 'Aisha- 'I (always) saw him urinating whilst sitting down' - a man knows more about that (about such matters) than she.' Ahmad bin 'Abdur-Rahman said: 'It was the custom of the Arabs to urinate standing up. Do you not see that in the Hadith of 'Abdur-Rahman bin Hasanah it was said: 'He sits down to urinate as a woman does.'"
Chapter 15: It is undesirable (Makruh) to touch the penis and to clean oneself from the call of nature with the right hand
Another chain with similar wording.
"I heard 'Uthman bin 'Affan say: 'I never sang a song or told a lie or touched my penis with my right hand after I swore on oath of allegiance to the Messenger of Allah to that effect.'"
"The Messenger of Allah said: 'When anyone of you cleans himself, he should not clean himself with his right hand. Let him clean himself with his left hand.'"
Chapter 16: Cleaning oneself with stones, and the prohibition of using dung and bones
"The Messenger of Allah said: 'I am to you like a father to his son, and I teach you. So when you go to relieve yourselves, do not face the Qiblah or turn your backs towards it.' He ordered us to use three pebbles, and he forbade us to use dung and bones, and he forbade cleaning oneself with the right hand."
"The Messenger of Allah went to the toilet and said: 'Bring me three stones.' So I brought him two stones and a piece of dung. He took the two stones and threw the dung away, saying: 'It is impure.'"
"The Messenger of Allah said: 'For cleaning yourself you need three stones, no one of them being dung.'"
"I see that your companion (the Prophet) is teaching you everything, even how to relieve yourselves?" He said: "Yes indeed. He has ordered us not to face the Qiblah (prayer direction) nor to clean ourselves with our right hands, and not to be content with anything less than three stones, which are not to include any excrement or bones."
Chapter 17: The prohibition of facing the Qiblah when defecating or urinating
"I am the first one who heard the Prophet say: 'No one among you should urinate facing towards the Qiblah,' and I am the first one who told the people of that."
"The Messenger of Allah forbade the person who went to the Gha'it to face the Qiblah. He said: 'face towards the east or the west.'"
"The Messenger of Allah forbade us from facing either of the two Qiblah when defecating or urinating."
"Abu Sa'eed Al-Khudri narrated to me, that he bears witness that the Messenger of Allah forbade facing the Qiblah when defecating or urinating.'"
"The Messenger of Allah forbade me from drinking while standing and from urinating while facing the Qiblah."
Chapter 18: Permission concerning that in the toilet with walls and its permissiblity, not in deserts
"People say: 'When you sit to relieve yourself, do not face the Qiblah.' But one day I climbed up onto the roof of our house, and I saw the Messenger of Allah sitting on two bricks (to relieve himself), facing the direction of Baitul-Maqdis (Jerusalem)." This is a Hadith narrated by Yazid bin Harun.
"I saw the Messenger of Allah in his (constructed) toilet, facing towards the Qiblah." (Da'if)(One of the narrators) 'Eisa said: "I told that to Sha'bi, and he said: 'Ibn 'Umar spoke the truth. As for the words of Abu Hurairah, he said: "In the desert do not face the Qiblah nor turn one's back towards it." As for the words of Ibn 'Umar, he said: "In the (constructed) toilet there is no Qiblah so turn in whatever direction you want."Another chain with similar wording.
"Mention was made in the presence of the Messenger of Allah of some people who did not like to face towards the Qiblah with their private parts. He said: 'I think that they do that. Turn my seat (in the toilet) to face the Qiblah.'" (Da'if)Another chain with similar wording.
"The Messenger of Allah forbade facing the Qiblah when urinating. But I saw him, one year before he died, facing the Qiblah (while urinating)."