Abu al-Hallal al-Ataki (may Allah have mercy on him) said: A man came to Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) who had said to his wife: 'Habluki ala gharibiki' (your rope is on your withers). Sayyiduna Umar (may Allah be pleased with him) said: "Meet us during the Hajj season." So the man related his story at the House of Allah, and he said: "Do you see that bald man who is performing tawaf around the House of Allah? Go to him and ask him, then come back and tell me." When the man went to him, it was Sayyiduna Ali (may Allah be pleased with him). Sayyiduna Ali (may Allah be pleased with him) asked: "Who sent you to me?" The man said: "The Commander of the Believers; (the matter is) that he said to his wife: 'Habluki ala gharibiki'." Sayyiduna Ali (may Allah be pleased with him) said: "Face the House of Allah and swear by Allah that you did not intend divorce." The man said: "By Allah, I did intend divorce." Sayyiduna Ali (may Allah be pleased with him) said: "Your wife has become separated from you."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الخلع والطلاق / 15011