25 It happened the same night, that Yahweh said to him, “Take your father’s bull, even the second bull seven years old, and throw down the altar of Baal that your father has, and cut down the Asherah that is by it; 26 and build an altar to Yahweh your God on the top of this stronghold, in the orderly manner, and take the second bull, and offer a burnt offering with the wood of the Asherah which you shall cut down.” 27 Then Gideon took ten men of his servants, and did as Yahweh had spoken to him: and it happened, because he feared his father’s household and the men of the city, so that he could not do it by day, that he did it by night. 28 When the men of the city arose early in the morning, behold, the altar of Baal was broken down, and the Asherah was cut down that was by it, and the second bull was offered on the altar that was built. 29 They said one to another, “Who has done this thing?”
When they inquired and asked, they said, “Gideon the son of Joash has done this thing.” 30 Then the men of the city said to Joash, “Bring out your son, that he may die, because he has broken down the altar of Baal, and because he has cut down the Asherah that was by it.”
Matthew Henry's Commentary on Judges 6:25-30
Commentary on Judges 6:25-32
(Read Judges 6:25-32)
See the power of God's grace, that he could raise up a reformer; and the kindness of his grace, that he would raise up a deliverer, out of the family of a leader in idolatry. Gideon must not think it enough not to worship at that altar; he must throw it down, and offer sacrifice on another. It was needful he should make peace with God, before he made war on Midian. Till sin be pardoned through the great Sacrifice, no good is to be expected. God, who has all hearts in his hands, influenced Joash to appear for his son against the advocates for Baal, though he had joined formerly in the worship of Baal. Let us do our duty, and trust God with our safety. Here is a challenge to Baal, to do either good or evil; the result convinced his worshippers of their folly, in praying to one to help them that could not avenge himself.