Avertantur retrorsum et erubescant qui

Source: 
Vercelli, Biblioteca Capitolare, CLXX
Folio: 
078r
Sequence: 
17
Feast: 
Fer. 5 in Cena Dom.
Office/Mass: 
M
Genre: 
A
Position: 
1.2
Cantus ID: 
001547
Mode: 
8
Differentia: 
c
Differentia database: 
1--k-k-h-k-l-k--4 99d
Manuscript Reading Full Text (standardized spelling): 
Avertantur retrorsum et erubescant qui cogitant mihi mala