The Study Guide I have added today is for Group 13, and it includes a good verse about the oxen and their manger, although it is not about the nativity: Ubi non sunt boves, praesepe vacuum est.AudioLatin.com: Proverbs: Here is the audio for 10 more Latin proverbs - just the audio, but there is a link to a page where you can get English translations and commentary on the proverbs, too.