The One for Whom Allah Decrees Hell and Prohibits Jannah
Abu Umamah (radi Allahu anhu) reported that the Messenger of Allah (sal Allahu alaihi wa sallam) said, “Allah decrees the (Hell) Fire and prohibits Jannah for the one who seizes 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).”
The importance of rights of people is evident from the threat of severe punishment that this Hadith holds for the takers of these rights. Their case will depend entirely on the Will of Allah. Such defaulters may be forgiven even in the initial stage or they may be pardoned by Allah after some punishment.
And Allah Knows Best!