It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "O young men of Quraysh! Do not commit fornication. Take heed! Whoever guards his private parts, Paradise is for him." This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him): Abu al-Darda (may Allah be pleased with him) and I were with the Prophet (peace and blessings be upon him), and I heard him (peace and blessings be upon him) say: "Whoever guards what is between his two jaws (fuqmayhi) and between his two legs has entered Paradise."

The same narration is also reported through another chain, in which the narrator's name is given as Aqil.

It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever guarantees me what is between his two jaws (the tongue) and what is between his two legs (the private parts), I guarantee him Paradise." This hadith has an authentic chain (sahih al-isnad) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.

It is narrated from Sayyiduna Ubadah bin al-Samit (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "Guarantee me six things from yourselves, and I will guarantee you Paradise: speak the truth when you speak, fulfil your promise when you promise, render back the trust when something is entrusted to you, guard your private parts, lower your gaze, and restrain your hands (from wrongdoing and aggression)." This hadith has an authentic chain (sahih al-isnad), but the two Shaykhs (Bukhari and Muslim) did not record it, and the hadith of Sa'd bin Sinan narrated from Sayyiduna Anas (may Allah be pleased with him) is a supporting witness (shahid) for it.

It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Guarantee me six things of yours, and I will guarantee you Paradise." The Companions asked: What are they? He (peace and blessings be upon him) said: "When one of you speaks, let him not lie; when he makes a promise, let him not break it; when something is entrusted to him, let him not betray it; and lower your gaze, restrain your hands (from wrongdoing), and guard your private parts."

Zirr bin Hubaysh narrates that Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him) asked me: How many verses of Surah al-Ahzab do you recite, or how many of its verses do you count? I said: Seventy-three (73) verses. He said: Only that many? I replied: Yes, only that many. He said: I have seen this surah when it was equal to Surah al-Baqarah, and we used to recite this verse in it as well: "The old man and the old woman, when they commit adultery, stone them both without fail (rajm); it is an exemplary punishment from Allah, and Allah is Almighty, All-Wise." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he said: Whoever denies stoning (rajm, the punishment of stoning to death) has denied the Qur'an from where he does not even suspect. (Then he recited this verse): "O People of the Book, Our Messenger has come to you, making clear to you much of what you used to conceal of the Book." [Surah al-Ma'idah: 15] So stoning was among the things that they had concealed. This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.

It is narrated from Abu Umamah bin Sahl bin Hunayf that his maternal aunt told him that the Messenger of Allah (peace and blessings be upon him) taught us to recite this verse of stoning: "The old man and the old woman, stone them both without fail for the pleasure they have taken." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it with this wording.

It is narrated from Kathir bin al-Salt that Ibn al-As and Sayyiduna Zayd bin Thabit (may Allah be pleased with him) were writing the copies of the Qur'an (masahif). When they reached this verse, Zayd said: I heard the Messenger of Allah (peace and blessings be upon him) say: "The old man and the old woman, stone them both without fail." At this Sayyiduna Umar (may Allah be pleased with him) said: When it was revealed, I came to the Prophet (peace and blessings be upon him) and said: Shall I write it down (in the Qur'an)? And he (peace and blessings be upon him) disliked that. Then Umar (may Allah be pleased with him) said (explaining): Do you not see that when an old man commits adultery while he is muhsan (married), he is flogged and also stoned, and if he is not muhsan he is flogged; and likewise, when a married person commits adultery while being married, he is stoned? This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.