Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah(PBUH) said, "He who does not acquire knowledge with the sole intention of seeking the Pleasure of Allah but for worldly gain, will not smell the fragrance of Jannah on the Day of Resurrection.''
[Abu Dawud].

Commentary: This Hadith has an inducement for acquiring knowledge for the Pleasure of Allah alone. If a religious scholar acquires it to make it a means of worldly gains, then it turns to such a serious crime that such a scholar will not even smell the fragrance of Jannah (i.e., he will not enter it along with the saved). May Allah save us from it. However, if a scholar gains wealth and worldly gains through it without any intention, then it is altogether a different matter. In that case, it is not harmful for him as long as he uses it in a manner pleasing to Allah.

Narrated by Abu Huraira (Radhiallaho anho):
The Prophet (sallallaahu 'alaihi wasallam) said, "Martyrs are
those who die because of drowning, plague, an abdominal
disease, or of being buried alive by a falling building." And
then he (sallallaahu 'alaihi wasallam) added, "If the people
knew the reward for the Zuhr prayer in its early time, they
would race for it. If they knew the reward for the 'Isha' and
the Fajr prayers in congregation, they would join them even if
they had to crawl. If they knew the reward for the first row,
they would draw lots for it."

Bukhari Vol. 1 : No. 688

Narrated by Anas bin Malik (Radhiallaho anho):
I never prayed behind any Imam a prayer lighter and more
perfect than that behind the Prophet (sallallaahu 'alaihi
wasallam) and he (sallallaahu 'alaihi wasallam) used to cut
short the prayer whenever he heard the cries of a child lest
he should put the child's mother to trial.

Bukhari Vol. 1 : No. 676

SAHIH BUKHARI
Volume 3, Book 47, Number 740:

Narrated Abu Huraira:

The Prophet said, "O Muslim women! None of you should look down upon the gift sent by her she-neighbour even if it were the trotters of the sheep (fleshless part of legs)."

Abu Hurairah (May Allah be pleased with him) said: The Messenger of Allah (PBUH) said, "There are three (types of) people with whom Allah will neither speak on the Day of Resurrection nor purify them (from sins) and there will be a painful chastisement for them: A person who has spare water in a desert and he refuses to give it to the traveller; a person who sells a commodity to another person after the afternoon prayer and swears by Allah that he has bought it at such and such price, and the buyer pays him accordingly though in reality it was not true; and a person who pledges allegiance to an Imam (leader) just for some worldly benefit, and then if the Imam bestows on him (something out of that) he fulfills his allegiance, and if does not give him, he does not fulfill it.''
[Al-Bukhari and Muslim].

Sahih Bukhari
Volume 8, Book 76, Number 453:
Narrated Abu Huraira:

The Prophet said, "Riches does not mean, having a great amount of property, but riches is self-contentment."

`Abdullah bin `Amr bin Al-`as (May Allah be pleased with him) reported: The Messenger of Allah (PBUH) said, "Four are the qualities which, when found in a person, make him a sheer hypocrite, and one who possesses one of them, possesses one characteristic of hypocrisy until he abandons it. These are: When he is entrusted with something, he betrays trust; when he speaks, he lies; when he promises, he acts treacherously; and when he argues, he behaves in a very imprudent, insulting manner.''
[Al-Bukhari and Muslim].

Commentary: Theologically speaking, a disagreement between heart and tongue - or word and deed - about the declaration of faith in Islam is defined as hypocrisy. In the lifetime of the Prophet (PBUH) there existed a group of hypocrites whose traits of characters have been outlined in Ahadith. Humanly it is not possible to perceive malice hidden in one's heart. Even Messenger of Allah (PBUH) hardly knew what lay in the hearts of people because, despite having the exalted status of Prophethood, he was fundamentally a human. Allah, however, had revealed hearts to him. But today, we have no error-free source to pick hypocrites from the ranks of believers. Quite naturally, we fall back on the Hadith which provides us definite symptoms of the character and manners of hypocrites so as to distinguish them from sincere Muslims.

`Ulama' say that there are two aspects of hypocrisy, relating to faith and practice. In the first case, a hypocrite conceals his disbelief in his heart but verbally professes Islam. Anyone who belongs to this category of hypocrites will be, as stated in the Qur'an: "In the lowest depths of the Fire.'' (4:145). In the second case, a man does have faith in his heart but in practice he portrays the characteristics of a hypocrite, unfortunately a majority of today's Muslims practically behave like hypocrites and possess their propensities. It is this hypocritical attitude and moral deficiencies of Muslims that have degraded them and made Islam unappealing. May Allah put Muslims on the right path!

Anas (May Allah be pleased with him) reported: Messenger of Allah (PBUH) said, "Three follow a dead body: members of his family, his possessions and his deeds. Two of them return and one remains with him. His family and his possessions return; his deeds remain with him".
[Al-Bukhari and Muslim].

Commentary: This Hadith induces one to perform such deeds which always remain with him in the grave, where every being and thing leaves one and he is all alone in the grave. What is left is his good deeds which become the means of refuge and salvation.

Abu Hurairah (May Allah be pleased with him) reported: Messenger of Allah (PBUH) said, "Be prompt in doing good deeds (before you are overtaken) by turbulence which would be like a part of the dark night. A man would be a believer in the morning and turn to disbelief in the evening, or he would be a believer in the evening and turn disbeliever in the morning, and would sell his Faith for worldly goods.''
[Muslim].

Commentary: This Hadith tells that the Day of Resurrection will be preceded by a long chain of calamities. Because of the rush of these calamities, religion and Faith will loose their value in people. There will be a race for wealth, so much so that people would not hesitate to compromise their religion and Faith to acquire wealth. People will rapidly change their faces. This is what actually happening. In this situation true believers are exhorted to adhere strictly to Faith and perform noble deeds without delay.

Abdullah bin `Umar bin Al-Khattab (May Allah be pleased with them) reported that: The Prophet (PBUH) said, "Allah accepts a slave's repentance as long as the latter is not on his death bed (that is, before the soul of the dying person reaches the throat)".
[At-Tirmidhi, who categorised it as Hadith Hasan].

Commentary: The word Ghargharah means the stage when soul is about to leave the body and reaches the throat. In other words, the time when one suffers the agony of death.

Hadith Hasan means that Hadith the authenticity of which is connected without any technical defect. Their narrators, however, are next to those of Hadith Sahih. In the opinion of Muhaddithin (Hadith scholars), Hadith Hasan is also reliable as Hadith Sahih.

Abu Hurairah (May Allah be pleased with him) narrated: Messenger of Allah (PBUH) said, "Allah does not look at your figures, nor at your attire but He looks at your hearts and accomplishments".
[Muslim].

Commentary: This Hadith highlights the importance of sincerity and good intention. It is, therefore, essential that every noble action should be based on these two virtues; and heart should be free from all such things that destroy noble deeds. Hypocrisy, ostentation, greed for wealth, riches and other wordly things fall in the category of such evils. Since the true condition of heart is known to Allah alone, the true position of one's actions will be known on the Day of Resurrection when one will be requited for them by Alah. In this world, one will be treated according to his apparent condition while his insight will be left to Allah.