Sayyiduna Ibn Umar (may Allah be pleased with them both) said: When Umar (may Allah be pleased with him) was stabbed, the people sent for a physician. A man from the Ansar came and gave him milk to drink, and the milk came out white from the wound below the navel. The physician said: "Make your final will, for I do not think you will live until evening." Umar (may Allah be pleased with him) said: "He has told me the truth."
Hadith Referenceالمعجم الكبير للطبراني / العشرة / 77