It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Many a (humble) person, dishevelled, dust-covered and wearing two worn-out garments, whom people's eyes do not like to look at (regarding him as lowly), if he were to swear an oath relying on Allah, Allah would surely fulfil his oath." This hadith has a sahih (authentic) chain of narration. I think that Imam Muslim recorded it through the narration of Hafs bin Abdullah bin Anas.

It is narrated from Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) that he went out to the mosque of the Messenger of Allah (peace and blessings be upon him) and saw Sayyiduna Mu'adh bin Jabal (may Allah be pleased with him) sitting and weeping beside the blessed grave of the Messenger of Allah (peace and blessings be upon him). He asked: O Mu'adh! What makes you weep? He said: What makes me weep is something I heard from the occupant of this grave (that is, the Messenger of Allah (peace and blessings be upon him)). He asked: What did you hear? He said: I heard him (peace and blessings be upon him) saying: "Even a little showing off (riya') is shirk (associating partners with Allah). Whoever shows enmity to a friend (wali) of Allah has openly declared war on Allah Almighty. And indeed Allah loves the hidden, God-fearing ones who, if they are absent, are not missed, and if they are present, are not invited (into gatherings) nor recognised. Their hearts are lamps of guidance; they come out (safely) from every dark and dusty trial." 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 Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever makes all his concerns a single concern (the Hereafter), Allah will suffice him against the worries of his worldly life and his Hereafter. And whoever is scattered by his concerns (along the various paths of the world), Allah does not care in which of the valleys of this world he perishes." 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 Abu Ubaydah bin al-Jarrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The heart of the son of Adam is like a sparrow; it turns over seven times in a day." This hadith is sahih (authentic) on the condition of Muslim, but the two Shaykhs did not record it.

It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "If one of you were to do a deed inside a solid rock that has no door and no opening, Allah Almighty would bring his deed out (before people), whatever that deed may be."

It is narrated from Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Hidden shirk (concealed association of partners with Allah) is that a man does a deed (for show) because of another man's presence or standing." 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 Shaddad bin Aws (may Allah be pleased with him) that he said: "In the blessed era of the Messenger of Allah (peace and blessings be upon him), we used to count showing off (riya') as the lesser shirk (minor association of partners with Allah)." 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 Shaddad bin Aws (may Allah be pleased with him) that he said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "Whoever prays to show off, and whoever fasts to show off, has certainly committed shirk; and whoever gives charity to show off has certainly committed shirk as well."

It is narrated from Tawus (may Allah have mercy on him) that a man said: O Prophet of Allah! I stand in a place (for a good deed) where my aim is to seek the pleasure of Allah, but I also like that my position be seen (by people). The Messenger of Allah (peace and blessings be upon him) gave him no reply until this verse was revealed: "So whoever hopes to meet his Lord, let him do righteous deeds." [Surah al-Kahf: 110]

Ubadah bin Nusayy said: I went to Sayyiduna Shaddad bin Aws (may Allah be pleased with him) at his place of prayer, and he was weeping. I asked: O Abu Abd al-Rahman! What has made you weep? He said: A hadith that I heard from the Messenger of Allah (peace and blessings be upon him). I said: What is it? He said: Once I was with the Messenger of Allah (peace and blessings be upon him) when I saw on his blessed face a look that saddened me. I said: May my father and mother be sacrificed for you, O Messenger of Allah! What is this that I see on your blessed face? He (peace and blessings be upon him) said: "A matter that I fear for my Ummah after me." I said: What is it? He (peace and blessings be upon him) said: "Shirk and a hidden desire (of the self)." I said: O Messenger of Allah! Will your Ummah commit shirk after you? He (peace and blessings be upon him) said: "O Shaddad! Behold, they will not worship the sun, an idol or a stone, but they will show off their deeds to people." I said: O Messenger of Allah! Is showing off (riya') shirk? He (peace and blessings be upon him) said: "Yes." I said: And what is the hidden desire? He (peace and blessings be upon him) said: "One of you begins the day fasting (a voluntary fast), then one of the desires of this world presents itself to him, and he breaks his fast (without excuse)." This hadith has a sahih (authentic) chain of narration, but the two Shaykhs (Bukhari and Muslim) did not record it.