John Gill Commentary 1 Kings 20:25

"and number thee an army, like the army that thou hast lost, horse for horse, and chariot for chariot; and we will fight against them in the plain, and surely we shall be stronger than they. And he hearkened unto their voice, and did so." — 1 Kings 20:25 (ASV)

And number thee an army like the army that thou hast lost ,
&c.] Raise an army of an equal number, which they supposed he was able to do:

horse for horse and chariot for chariot ;
as many horses and chariots as he had before:

and we will fight against them in the plain ;
where they could make use of their horses and chariots to greater advantage than on hills and mountains, see (Judges 1:19)

and surely we shall be stronger than they ;
and beat them:

and he hearkened unto their voice, and did so ;
took their counsel, and prepared an army, and placed captains in it instead of kings.