Isaiah 56:10
Douay-Rheims
His watchmen are all blind, they are all ignorant: dumb dogs not able to bark, seeing vain things, sleeping and loving dreams.
John Chrysostom
Hence even sacred Scripture, with these sorts of disturbing passions in mind, in many places applies the names of brutes and of wild beasts to those gifted with reason; sometimes it calls them "dogs" on account of their shameful and headstrong behavior—"dumb dogs," since they are "unable even to bark."
Source details
A.D. 407 · on Isa 56:10 (HOMILIES ON GENESIS 12:10)
Imported from an open dataset — not yet checked against the printed edition.