Abu Hurairah, radhiallahu `anhu, reported: Messenger of Allah, sallallahu `alayhi wa sallam, said, "Do you know who is the bankrupt?" The bankrupt among us is one who has neither money with him nor any property." He said, "The real bankrupt of my Ummah would be he who would come on the Day of Resurrection with Salat, Saum, and Sadaqah (charity), but he will find himself bankrupt on that day as he will have exhausted the good deeds) because
he reviled others,
brought calumny against others,
unlawfully devoured the wealth of others,
shed the blood of others and
beat others;
so his good deeds would be credited to the account of those (who suffered at his hand). If his good deeds fall short to clear the account, their sins would be entered in his account and he would be thrown in the (Hell) Fire." [Muslim]

Abu Umamah, radhiallahu `anhu, reported: Messenger of Allah, sallallahu `alayhi wa sallam, said: "Allah decrees the (Hell) fire and debars Jannah for the one who usurps the rights of a believer by taking a false oath." One man asked: "O Messenger of Allah! Even if it should be for an insignificant thing?" He said, "Even if it be a stick of the Arak tree (i.e. the tree from which Miswak sticks are taken)." [Muslim]

Abu Hurairah, radhiallahu `anhu, reported: The Prophet, sallallahu `alayhi wa sallam, said: "He who has done a wrong affecting his brother's honour or anything else, let him ask his forgiveness today before the time (i.e. the Day of Resurrection) when he will have neither a dinar nor a dirham. If he has done some good deeds, a portion equal to his wrongdoings will be subtracted from them; but if he has no good deeds, he will be burdened with the evil deeds of the one he had wronged in the same proportion." [Al-Bukhari]

Jabir, radhiallahu `anhu, reported:A Messenger of Allah, sallallahu `alayhi wa sallam, said: "Beware of injustice, for oppression will be darkness on the Day of Resurrection; and beware of stinginess because it doomed those who were before you. It inclined them to shed blood and treat the unlawful as lawful." [Muslim]

Abu Hurairah, radhiallahu `anhu, reported:A Messenger of Allah, sallallahu `alayhi wa sallam, said, "On the Day of Resurrection, the rights will be paid to those to whom they are due so much so that a hornless sheep will be retaliated for by punishing the horned sheep which broke its horns." [Muslim]