Adages — Old Testament book (8)
I believe the answer is:
proverbs
This clue is a double definition.
'adages' is the first definition.
('proverb' can be a synonym of 'adage')
'old testament book' is the second definition.
(I've seen this before)
(Other definitions for proverbs that I've seen before include "Old Testament book ascribed to Solomon, or well-known sayings" , "Truthful expressions" , "Adages, saws" , "More than one saw" , "Gnomes" .)