Sahih Bukhari | Volume 3 | Hadith Number 470

Narrated by Abu Huraira
The Prophet said, "Allah said, 'I will be an opponent to three types of people on the Day of Resurrection:

1. One who makes a covenant in My Name, but proves treacherous.

2. One who sells a free person and eats his price.

3. One who employs a labourer and takes full work from him but does not pay him for his labour.'"