Translation
4 Reasons Unda is Ingenious in Ave Verum Corpus
The four main lines of Ave Verum Corpus originate at least from the 1300s, attributed to Étienne Aubert, better known as Pope Innocent VI. Ave, verum corpus natum de Maria Virgine; Vere passum, immolatum in cruce pro homine: Cuius latus perforatum, unda fluxit sanguine; Esto nobis praegustatum in mortis examine.