Yes, it was "fail to timely fall" that completely threw me off. I could not get past them. Pride falling is a very, very general reference, dating back to the roots of Judeo-Christian-Islamic theology. One sees it everywhere.
Still, we were stumped quite nicely. Perhaps if it were phrased "Into what was pride not cast", or something like that. Still, stumping Google searches is a good idea. I tried everything with "pride" and "timely fall" that I could, together with the keyword "Tolkien", and I got nothing (unless it was buried in search result 1,304,260). NOT THAT I WOULD HAVE USED SUCH AN ILLEGALLY OBTAINED ANSWER!!! I do have some pride, after all. When I'm beat, I'm beat, and I won't cheat. I was just frustratingly curious!