Sayyiduna Ibn Abbas (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) said: "Bring me a shoulder blade and an inkpot, so that I may write for you a document about which no two men will ever differ after it." Ibn Abbas (may Allah be pleased with them both) said: "The people delayed in bringing the shoulder blade and the inkpot, and then Allah took his (peace and blessings be upon him) soul."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10916