Musannaf Ibn Abi Shaybah 30448 — A man who has intercourse

Ibrahim said that a man came to Sayyiduna Ibn Mas'ud (may Allah be pleased with him) and said: "I have had intercourse with my wife's slave woman." He said: "Allah has concealed you, so conceal yourself." This reached Sayyiduna Ali (may Allah be pleased with him), and he said: "If the man who came to Ibn Umm Abd had come to me, I would surely have crushed his head with stones."