Judges 6:31
And Joash said unto all that stood against him, Will ye plead for Baal? will ye save him? he that will plead for him, let him be put to death whilst it is yet morning: if he be a god, let him plead for himself, because one hath cast down his altar.
After Israel had suffered oppression under Midian and confessed its sins, Gideon was raised up to help deliver the people. This belongs to the account of the faithful and valiant deliverers raised up to put down idolatry and rescue Israel from its enemies, showing that God had not utterly forsaken His people but sent deliverance after chastisement. Yet when the deliverer died the people returned to their idols, repeating the cycle of backsliding and chastisement followed by confession and deliverance.
Joash spoke these words in defense of Gideon after Gideon tore down Baal's altar, when the people wanted Gideon put to death. He challenged those who wanted to take up Baal's cause or rescue him, arguing that if Baal were truly a god he could vindicate himself against the one who had cast down his altar. Baal's inability to defend his own altar exposed his powerlessness, proving he could not protect his worshipers and was unworthy of their worship and trust.