Matthew Poole and continuators on Judges 9:5

5 And he went unto his fathers house at Ophrah, and slew his brethren the sons of Jerubbaal , being threescore and ten persons , upon one stone : notwithstanding, yet Jotham the youngest son of Jerubbaal was left, for he hid himself.

The onely persons who were likely to hinder him in establishing his Tyranny.

Wanting one, who is here expressed; And these Synecdochical expressions are frequent in Scripture, See Gen. 35. 26. and 42. 13. Numb. 14. 32, 33. Ioh. 20. 24. 1 Cor. 15. 5.

Whereby he would signifie, that this was either, 1. An act of Justice, in cutting them all off in an orderly matter, for some supposed Crime, probably, as designing Sedition and Rebellion: Or, 2. An act of Religion in avenging the dishonour and injury done to Baal by Gideon, Iudg. 6. 27, 28. upon his Children, whom he offered up as so many Sacrifices to Baal upon this Stone, which served for an Altar; and for this reason it seems the Money was taken out of Baal's House, because it was to be laid out in his Service.