Judges 4:9 - Albert Barnes' Notes on the Bible

Mark the unhesitating faith and courage of Deborah, and the rebuke to Barak’s timidity, “the Lord shall sell Sisera into the hand of a woman” (Jael, Judges 4:22). For a similar use of a weak instrument, that the excellency of the power might be of God, compare the history of Gideon and his 300, David and his sling, Shamgar and his ox-goad, Samson and the jawbone of the ass. (See 1 Corinthians 1:26, 1 Corinthians 1:31.) Barak would probably think the woman must be Deborah. The prophecy was only explained by its fulfillment. Her presence as a prophetess would give a divine sanction to Barak’s attempt to raise the tribes of Zebulun and Naphtali. To Barak himself it would be a pledge of her truth and sincerity. She probably commissioned some chief to raise the tribes of Ephraim, Benjamin, and Manasseh (Judges 5:14, compare Psalms 80:2), while she went with Barak and mustered Zebulun, Naphtali, and Issachar.