The stone, a piece of millstone, which the woman cast down was a piece of a millstone as God's symbolism is in play. A millstone is a set of circular stones which grind grain into flour, which becomes flour, a powdery dust like substance used for culinary purposes. One sees the symbolism here between Luke 20:18 “...but on whomsoever it shall fall, it will grind him to powder.” in the fact that the stone cast down upon Abimelech was a piece of millstone, that which was designed originally to grind grain into the powder of flour, and so it seems that Abimelech heart was tried by God one last time as he was, through an act of God, felled by a stone from which though given space to repent Abimilech himself in his pride neglected to do, and so returned unto the dust to await condemnation. Proverbially Abimelech was “ground into powder” by God. Also, one assumes perhaps that the piece of millstone is metaphorically Jesus Christ because of Genesis 3:15 the stone fulfills the bruising of the forehead of seed of the serpent (Abimelech) by the seed of the Woman Eve (which Jesus does descend from in his humanity). Abimelech skull was crushed. It is a reasonable assumption to assume that Abimelech's forehead was damaged in the process of having his skull crushed.

In like manner one perceives the symbolism elsewhere in the Bible for example, why a lamb without blemish (*being symbolic of the Lord Jesus Christ and also the final fulfillment of the promise given to Abraham*) according to the laws of Moses is the purest and highest offering made unto God and likewise symbolically the lambs blood sprinkled on the doors of captive Hebrew people on the day of passover, in which God's angel passed over his people to slay all the firstborn in the land of Egypt, that symbolized the final sacrifice made by Jesus wherein God will pass over the iniquity of humanity.

In Judges 9 the symbolism continues, Abimelech encapsulates the children of the serpent (Genesis 3:15), the children of the devil. According to the law of Mosses in Leviticus 22:24, it was likewise unacceptable to present any animal that has been crushed just as symbolically Abimilech, a murder of seventy of his brother, was crushed in receiving a mortal wound and was similarly unacceptable to God. The law of Mosses and it's ordinances as ornate and complex as they were and as difficult as it might be to surmise the reasoning behind them, they came from a Holy God and as such they were not and are not arbitrary. There is a purpose and a reason behind all of them, and we know that God's ways are higher then our ways (Isaiah 55:8-11).

Is their any need to allude to symbolism centuries before between the prior Amimelech king of the Philistines in the Land of Gerar in Cannan whom God just like a strong tower stood between Abraham and Issac and their wives as protectorate or does it start to take hold that God in his works and his omniscience is symbolic? Certainly, there seems more to be considered to the passage concerning Abimilech in Chapter 9 of the book of Judges then one might surmise at a passing glance.