Verily the Day of Sorting Out is the time appointed for all of them -
The Day when no protector can avail his client in aught and no help can they receive,
Except such as receive Allah's Mercy: for He is Exalted in Might, Most Merciful.
[Qur'an 44:40-42]

Narrated Abu Huraira(RA): The Prophet(PBUH) said, "Allah says, 'I will be against three persons on the day of Resurrection: 1. One who makes a covenant in My Name, but he proves treacherous. 2. One who sells a free person (as a slave) and eats the price, 3. And one who employs a laborer and gets the full work done by him but does not pay him his wages.' "