In contrast with the selfishness of the tribes just named, Deborah reverts with enthusiasm to the heroic prowess of Zebulun and Naphtali.

Zebulun and Naphtali - jeoparded their lives - The original is very emphatic, חרף נפשו למות chereph naphsho lamuth, they desolated their lives to death - they were determined to conquer or die, and therefore plunged into the thickest of the battle. The word jeoparded is a silly French term, and comes from the exclamation of a disappointed gamester: Jeu perdu! The game is lost; or J'ai perdue! I have lost.

Zebulun and Naphtali were a people,.... These two tribes were chiefly concerned in this war; out of them were the 10,000 men that followed Barak, who willingly offered themselves, and were the most active and vigorous:
that jeoparded themselves unto the death; exposed them to the utmost danger, fearless of death itself: or reproached (k) their lives; were careless of them, valued them not; they were not dear to them, but were ready to part with them freely, in the cause of liberty in which they were engaged:
in the high places of the field; on the top of Mount Tabor, where they were mustered, and from whence they beheld the vast host of Sisera surrounding them; and yet, with an undaunted bravery and courage, descended the hill to fight with them. The Vulgate Latin version reads, "in the country of Merome"; in the plains and fields of it, near which were the waters of Merom, where Joshua fought Jabin, a former king of Canaan, and supposed by some to be the same with Kishon here, Joshua 11:5.
(k) "probris affecit", Pagninus; so the Targum.

Zebulun and Naphtali acted quite differently. Zebulun showed itself as a people that despised its life even to death, i.e., that sacrificed its life for the deliverance of its fatherland. Naphtali did the same in its mountain home. The two tribes had raised 10,000 fighting men at Barak's call (Judges 4:10), who constituted at any rate the kernel of the Israelitish army.
If we run over the tribes enumerated, it seems strange that the tribes of Judah and Simeon are not mentioned either among those who joined in the battle, or among those who stayed away. The only way in which this can be explained is on the supposition that these two tribes were never summoned by Barak, either because they were so involved in conflict with the Philistines, that they were unable to render any assistance to the northern tribes against their Canaanitish oppressors, as we might infer from Judges 3:31, or because of some inward disagreement between these tribes and the rest. But even apart from Judah and Simeon, the want of sympathy on the part of the tribes that are reproved is a sufficient proof that the enthusiasm for the cause of the Lord had greatly diminished in the nation, and that the internal unity of the congregation was considerably loosened.
In the next strophe the battle and the victory are described: -

Jeoparded - Hebrews. despised, comparatively; they chose rather to venture upon a generous and honourable death, than to enjoy a shameful and servile life. High - places - That is, upon that large and eminent plain in the top of mount Tabor, where they put themselves in battle array, and expected the enemy; though when they saw they did not come up to them, they marched down to meet them.