From the early Church Fathers to now.
1 Jewish · 1 Reformed · 1 Lutheran
“The hoofs of the horses were broken whilst the stoutest of the enemies fled amain, and fell headlong down.”
“Horses' legs were battered. Their horses' hooves were severed. The heat of the star brought the mud to a boil, severing the hooves, as when legs are scalded in boiling water to detach the hooves. Once the hooves were severed, the legs were battered. By the prancing, the prancing of their mighty. They pranced their horses in battle, as in "a prancing horse. The word connotes the dancing of a horse.”
“Then were the horse hoofs broken by the means of the prancings--Anciently, as in many parts of the East still, horses were not shod. The breaking of the hoofs denotes the hot haste and heavy irregular tramp of the routed foe.”
“22 Then did the hoofs of the horses stamp With the hunting, the hunting of his strong ones. 23 Curse ye Meroz, saith the angel of the Lord; Curse ye, curse ye the inhabitants thereof! Because they came not to the help of Jehovah, To the help of Jehovah among the mighty. 24 Blessed before women be Jael, The wife of Heber the Kenite, Blessed before women in the tent! The war-chariots of the enemy hunted away in the wildest flight (Jdg 5:22). The horses stamped the ground with the continuous hunting or galloping away of the warriors. דהרה, the hunting (cf. דּהר, Nah 3:2). The repetition of the word expresses the continuance or incessant duration of the same thing (see Ewald, 313, a.). אבּירים, strong ones, are not the horses, but the warriors in the war-chariots. The suffix refers to סוּס, which is used collectively. The mighty ones on horses are not, however, merely the Canaanitish princes, such as Sisera, as Ewald maintains, but the warriors generally who hunted away upon their war-chariots.”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.