John Gill Commentary 2 Chronicles 32:7

"Be strong and of good courage, be not afraid nor dismayed for the king of Assyria, nor for all the multitude that is with him; for there is a greater with us than with him:" — 2 Chronicles 32:7 (ASV)

Be strong and courageous
Be of good heart and spirit, and quit yourselves like men:

be not afraid nor dismayed for the king of Assyria, nor for all the
multitude that is with him ;
which was very large; for no less than 185,000 were slain of them by an angel in one night, (2 Kings 19:35)

for there be more with us than with him ;
though not in number, yet in power and might; and if angels are meant, they are more in number; but it seems, by what follows, that Hezekiah had only the Lord his God in his thoughts and view.