en_tn_condensed/jdg/05/22.md

Then came the sound of horses' hooves—galloping, the galloping of his mighty ones

This describes the sound of many horses running away from the battle. Alternate translation: "Then I heard the sound of horses running away. Sisera's mighty horses were running away" (See: rc://en/ta/man/translate/figs-explicit)

galloping

runninb quickly