-os quos diu*

Source: 
Sankt Gallen, Stiftsbibliothek, 391
Marginalia: 
A
Folio: 
022b
Sequence: 
9
Feast: 
Magni
Office/Mass: 
X
Genre: 
A
Position: 
P
Cantus ID: 
200007
Mode: 
*
Manuscript Reading Full Text (standardized spelling): 
-os quos diu*
Manuscript Reading Full Text (MS spelling): 
-os quos diu
Indexing notes: 
What is the first word here? nos? -- Original in St. Gall library has been checked, and this is still unknown.