Judges 9:45 - Clarke's commentary and critical notes on the Bible

And Abimelech fought against the city all that day; and he took the city, and slew the people that was therein, and beat down the city, and sowed it with salt. And sowed it with salt - Intending that the destruction of this city should be a perpetual memorial of his achievements. The salt was not designed to render it barren, as some have imagined; for who would think of cultivating a city? but as salt is an emblem of incorruption and perpetuity, it was no doubt designed to perpetuate the memorial of this transaction, and as a token that he wished this desolation to be eternal. This sowing a place with salt was a custom in different nations to express permanent desolation and abhorrence. Sigonius observes that when the city of Milan was taken, in a.d. 1162, the walls were razed, and it was sown with salt. And Brantome informs us that it was ancient custom in France to sow the house of a man with salt, who had been declared a traitor to his king. Charles IX., king of France, the most base and perfidious of human beings, caused the house of the Admiral Coligni (whom he and the Duke of Guise caused to be murdered, with thousands more of Protestants, on the eve of St. Bartholomew, 1572) to be sown with salt! How many houses have been since sown with salt in France by the just judgments of God, in revenge for the massacre of the Protestants on the eve of St. Bartholomew! Yet for all this God's wrath is not turned away, but his hand is stretched out still.