Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated that the Messenger of Allah (peace and blessings be upon him) said: "The likeness 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 drowned."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12335