Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Prophet Muhammad (peace and blessings be upon him) said: "There are three people against whom I will be an opponent on the Day of Resurrection, and whomever I oppose, I will surely defeat him: One who gives protection to someone in My Name and then breaks his word; one who sells a free person and consumes his price; and one who hires a laborer, takes full work from him, but does not pay him his due wages."