en_tn/isa/05/27.md

Isaiah continues to describe the army that will attack Judah. (See: Isaiah 5:26)

None tire or stumble among them

"None of their soldiers get tired or fall"

nor will their belt be loose

The soldiers kept their robes tight so it would easier to move and fight.

the thong of their sandals

"the strap of their sandals"

their horses' hooves are like flint

Isaiah compares the hard part of a horse's foot to a hard stone which can cause a spark when struck. Alternate translation: "their horses' hooves are hard as stone." (See: rc://en/ta/man/translate/figs-simile)

and their chariot wheels like storms

Isaiah compares the chariot wheels to a storm to emphasize how quickly they are moving. Alternate translation: "and the wheels of the chariots will spin like a windstorm."