Bukhari :: Book 3 :: Volume 36 :: Hadith 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.' "
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