There were those in Israel who wanted to rely on Assyria and others who wanted to rely on Egypt. The prophet Isaiah urged that the LORD’S people wait on Him.
Trust in Egypt would be like dependence on a wall that was ready to collapse. The destruction would be as complete as “that of a potter’s vessel that is smashed so ruthlessly that among its fragments not a shard is found with which to take fire from the hearth, or to dip up water out of the cistern.”
Therefore thus says the Holy One of Israel, “Because you despise this word and trust in oppression and perverseness and rely on them, therefore this iniquity shall be to you like a breach in a high wall, bulging out, and about to collapse, whose breaking comes suddenly, in an instant; and its breaking is like that of a potter’s vessel that is smashed so ruthlessly that among its fragments not a shard is found with which to take fire from the hearth, or to dip up water out of the cistern.” (Isaiah 30:12-14 ESV)
The Believer’s Bible Commentary has this comment on our text:
Let it be recorded for posterity that the treaty with Egypt (and all such misplaced trust) is a blatant rejection of the law of the Lord through His prophets. Judah will see that Egypt is a poor wall of defense. In fact the high wall will bulge and crash. It will be smashed as completely as an earthenware vessel, with no fragments big enough to use in minor chores.
During archaeological excavations thousands of broken pottery shards are recovered. The destruction (judgment) of the LORD would be so complete that there would not even be a piece large enough to use to move coals of fire from a hearth, or large enough to dip water from a cistern.
In the photo below, made at Ramat Rachel between Jerusalem and Bethlehem, we see part of a pile of pottery shards recovered during the excavation of the site.
If enough large pieces of a pot or jar are found they may be restored. This can be seen in the photo below that was taken at the En-Dor archaeological museum.
Jeremiah used a similar illustration during the Babylonian period (19:10-11).