Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: When Sayyiduna Umar (may Allah be pleased with him) was stabbed, Sayyiduna Ibn Abbas (may Allah be pleased with them both) said to him: "O Commander of the Believers, may Allah reward you with good. Rejoice! The Messenger of Allah (peace and blessings be upon him) supplicated for you that Allah strengthen the religion through you, while the people were divided over it. When you accepted Islam, your Islam was a source of strength, and through you Allah made Islam, the Messenger of Allah (peace and blessings be upon him) and his Companions prevail. You emigrated to Madinah, and your emigration was a victory. Then the Messenger of Allah (peace and blessings be upon him) passed away while he was pleased with you."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 10577