Sayyiduna Abu Dharr (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) said: "The example of my household (Ahl al-Bayt) is like the ark of Nuh (peace be upon him): whoever boarded it was saved, and whoever stayed behind from it was drowned. And whoever fights us in the last age, it is as though he has fought alongside the Dajjal."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2623