Do unto them as unto the Midianites - Who were utterly defeated by Gideon, Judges 7:21, Judges 7:22.
As to Sisera - Captain of the army of Jabin, king of Canaan, who was totally defeated by Deborah and Barak, near Mount Tabor, by the river Kishon; and himself, after having fled from the battle, slain by Jael, the wife of Heber, the Kenite. See Judges 4:15, etc.
Do unto them as unto the Midianites - That is, Let them be overthrown and destroyed as the Midianites were. The reference here is to the complete overthrow of the Midianites, as related in Judges 4:4, Judges 4:6, Judges 4:14-15, and was slain by Jael, the wife of Heber the Kenite, Judges 4:17-21.
As to Jabin - The king of Canaan, in whose service Sisera was.
At the brook of Kison - Judges 4:13. This is a stream which rises near Mount Tabor, and empties itself into the Bay of Ptolemais. In Judges 5:21, in the song of Deborah on occasion of this victory, it is mentioned as “that ancient river, the river Kishon;” that is, it was a stream which was well known; which had been referred to in ancient tales and poetry; not a newly discovered river, but a river whose name and locality were familiar to all.