Amr bin Maymun (may Allah have mercy on him) said: I went to Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) when he had been stabbed. Sayyiduna Umar (may Allah be pleased with him) said: "O Abdullah, bring me the shoulder blade on which I wrote the matter of the grandfather yesterday." And he said: "If Allah had wanted to complete this matter, He would have completed it." Sayyiduna Abdullah (may Allah be pleased with him) said: "O Commander of the Faithful, we will spare you this matter." Sayyiduna Umar (may Allah be pleased with him) said: "No." Then he took it and erased it with his hand.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12415