Sunan Ibn Majah Book 16, Hadith 7

(Allah (SWT) says:) “I am the opponent of three on the Day of Resurrection, and if I am someone's opponent I will defeat him: A man who makes promises in My Name, then proves treacherous; a man who sells a free man and consumes his price; and a man who hires a worker, makes use to him, then does not give him his wages.”