Warning against showing off and the supplication that removes it

It is narrated from Sayyiduna Ma'qil bin Yasar (may Allah be pleased with him) that Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him) testified to this from the Messenger of Allah (peace and blessings be upon him): that the Messenger of Allah (peace and blessings be upon him), mentioning the subtleties of shirk (associating partners with Allah), said: "Shirk among you is more hidden than the sound of an ant creeping." At this Sayyiduna Abu Bakr (may Allah be pleased with him) said (in astonishment): O Messenger of Allah! Is shirk not only that someone is made a god alongside Allah? He (peace and blessings be upon him) said: "O Abu Bakr! May your mother lose you (that is, this matter is far deeper and more deserving of attention than you think). Shirk within you is more hidden than the creeping of an ant. Shall I not guide you to something which, when you adopt it, removes shirk from you, small and great (of every kind)? Supplicate with this du'a: 'Allahumma inni a'udhu bika an ushrika bika wa ana a'lamu, wa astaghfiruka lima la a'lamu' (O Allah, I seek refuge in You from knowingly associating anything with You, and I seek Your forgiveness for that (shirk) of which I have no knowledge)."
I (Ibn Hajar) say: Layth bin Abi Sulaym is a da'if (weak) narrator because of his poor memory and his mental confusion (ikhtilat), and his teacher is also unnamed (unknown).
Imam Abu Ya'la narrated, with his chain through Ibn Jurayj, under the saying of Allah Almighty: 'Or have they assigned to Allah partners who created as He created?' [Surah al-Ra'd: 16], that Sayyiduna Hudhayfah (may Allah be pleased with him) narrated it from Sayyiduna Abu Bakr (may Allah be pleased with him): either he himself was present in the gathering of the Prophet (peace and blessings be upon him), or Sayyiduna Abu Bakr (may Allah be pleased with him) told him that the Prophet (peace and blessings be upon him) said this same thing mentioned above.
In another chain it is narrated from Sayyiduna Ma'qil bin Yasar (may Allah be pleased with him); he relates: I was present with the Prophet (peace and blessings be upon him) together with Sayyiduna Abu Bakr al-Siddiq (may Allah be pleased with him) (or Sayyiduna Abu Bakr (may Allah be pleased with him) told me) that he (peace and blessings be upon him) said: "Shirk within you is more hidden than the creeping of an ant." Then he (peace and blessings be upon him) said: "Shall I not teach you words that will remove from you every aspect of this shirk, small and great? Say: 'Allahumma inni a'udhu bika an ushrika bika wa ana a'lamu, wa astaghfiruka lima la a'lamu' (O Allah, I seek refuge in You from knowingly associating anything with You, and I ask Your forgiveness for that shirk of which I have no knowledge)."
Musa bin Muhammad also transmitted this same narration with his chain through Abd al-Aziz.

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever performs his prayer beautifully and well in the presence of people, where people can see him, but when he is alone performs it badly (in a very deficient way), then this is indeed a contempt and belittling of his Lord which he displays towards his Lord."
This hadith is hasan (good).

It is narrated from Ju'ayd bin Abd al-Rahman that we were with Sayyiduna al-Sa'ib bin Yazid (may Allah be pleased with him) when al-Zubayr bin Sahl bin Abd al-Rahman bin Awf (may Allah be pleased with them) came to him, and the mark of prostration was prominent on his face. Sayyiduna al-Sa'ib (may Allah be pleased with him) asked: "Who is this?" We said: This is al-Zubayr bin Sahl. He said (in astonishment): "By Allah! This is not the mark that Allah, the Mighty and Majestic, mentioned in 'Their mark is on their faces from the trace of prostration' [Surah al-Fath: 29]. I have been prostrating on my face for eighty years, yet (despite this abundance of prostration) prostration has left no mark between my eyes."
This chain is sahih (authentic), and this report is mawquf (stopping at the Companion).

It is narrated from Jabalah al-Yahsubi that we were with one of the Companions of the Prophet (peace and blessings be upon him), and among the hadith he narrated to us was this: a Muslim said: O Messenger of Allah! What is the path of salvation tomorrow, on the Day of Resurrection? He (peace and blessings be upon him) said: "Do not try to deceive Allah Almighty." The man said: How can Allah, the Mighty and Majestic, be deceived? He (peace and blessings be upon him) said: "By your doing what Allah has commanded you, while your aim in it is someone other than the pleasure of Allah. So beware of showing off (riya'), for it is shirk with Allah, the Mighty and Majestic. Indeed, on the Day of Resurrection the show-off will be called before all of creation by four names: O wicked one! O disbeliever! O loser! O deceiver! Your deeds have gone to waste and your reward is lost; today you have no share with Allah Almighty. O cheat! Now go and seek your reward from the one for whose display you used to act." Jabalah says: I asked that Companion: Do you swear by Allah, besides whom there is no god worthy of worship, that you yourself heard this saying from the Messenger of Allah (peace and blessings be upon him)? He replied: By Allah, besides whom there is no god! I heard this directly from the Messenger of Allah (peace and blessings be upon him), unless something (in the telling) has slipped in that I did not intend. Yazid says: I think he recited these verses of the Noble Qur'an: 'So whoever hopes to meet his Lord, let him do righteous deeds and not associate anyone in the worship of his Lord' [Surah al-Kahf: 110] and 'Indeed, the hypocrites seek to deceive Allah, but He is deceiving them' [Surah al-Nisa': 142].
Imam Ahmad bin Mani' recorded this hadith in his Musnad; its chain contains al-Faraj bin Fadalah, a da'if (weak) narrator, though there are other authentic hadith on the prohibition of showing off and its being minor shirk.

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: "On the Day of Resurrection the son of Adam will be brought (before Allah) as if he were a little lamb," and sometimes the narrator, in doubt, related that he (peace and blessings be upon him) said: "as if he were a camel." "Then Allah, the Mighty and Majestic, will say: O son of Adam! I am the best of those who apportion. Look at the deed you did purely for Me; I will reward you for it. And look at the deed you did for someone other than Me; it is he who will repay you for it, the one for whom you did that deed."
Imam Abu Ya'la narrated it; its chain contains Yazid al-Raqashi, a da'if (weak) narrator, though the meaning of this hadith is established by other authentic hadith which mention that Allah Almighty is free of any need of partners.