Legend states the St. Gregory The nice (d. 604) listened to the first 3 lines chanted by angels on a particular Easter early morning in Rome even though he walked barefoot in a great spiritual procession and which the saint thereupon additional the fourth line: “Ora Professional nobis Deum. Alleluia.” https://vitapronobis97532.spintheblog.com/31531640/vita-pro-nobis-can-be-fun-for-anyone