Safwan b. Sulaim quoted the authority of a number of the sons of the Companions of God’s Messenger who told on the authority of their fathers that God’s Messenger said, “If anyone wrongs a man with whom a covenant has been made, or curtails any right of his, or imposes on him more than he can bear, or takes anything from him without his ready agreement, I shall be his adversary on the day of resurrection.” Abu Dawud transmitted it.