On the authority of Abu Hurayrah (may Allah be pleased with him), who said that the Messenger of Allah (PBUH) said that Allah the Almighty said:

{There are three (1) whose adversary I shall be on the Day of Resurrection: a man who has given his word by Me and has broken it; a man who has sold a free man (2) and has consumed the price; and a man who has hired a workman, has exacted his due in full from him and has not given him his wage.}

Related by al-Bukhaari (also by Ibn Maajah and Ahmad ibn Hanbal).

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(1) i.e. types of men.

(2) i.e. a man who has made a slave of another and has sold him.

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