Sayyiduna Jabir bin Samurah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) while he was delivering a sermon on the pulpit, saying: "There will be twelve guardians from Quraysh; the enmity of those who show enmity towards them will not harm them." The narrator said: I turned to look behind me, and there were Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) and my father among some people, and they confirmed the hadith for me just as I had heard it.
Hadith Referenceالمعجم الكبير للطبراني / باب الجيم / 2060