The Prophet said, Allah said, 'I will be an opponent to three types ...

Hadith 3:470

Narrated 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; and

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