When we consider the right path when facing a moral situation, as Catholics we draw on various sources for moral wisdom and direction, most notably Sacred Scripture and the Magisterium. But are their any moral teachings that are not explicitly in scripture but were handed down orally? In other words, are there any moral teachings that come down to us via Tradition?
I know that there is a prohibition against abortion in the Didache (c. 95) which has been consistently taught ever since. Are there are any other examples from Tradition of moral teachings?