Your question assumes the truth of 'sola scriptura', which people in the Catholic and Orthodox communions have never held. But even so, here's a scriptural reference for you: 2 Kings 13:21.
-A8
Good point.
But even so, the Scripture referenced tells me only that touching Elisha's bones can bring a dead man back to life, not "The bones (of those whom the Catholic Church call saints.) are holy, sanctified by the righteousness of the saint to whom they belonged."
That's a pretty big leap.