It was usual with the prophets to teach by signs. And we have the explanation, ver.
Matthew Henry
Concise Bible Commentary
The people of Israel had been to God as this girdle. He caused them to cleave to him by the law he gave them, the prophets he sent among them, and the favours he showed them. They had by their idolatries and sins buried themselves in foreign earth, mingled among the nations, and were so corrupted that they were good for nothing. If we are proud of learning, power, and outward privileges, it is just with God to wither them. The minds of men should be awakened to a sense of their guilt and danger; yet nothing will be effectual without the influences of the Spirit.
SDA Bible Commentary (limited)
Volume 1-7
9. Great pride of Jerusalem. The vain, boastful, arrogant pride arising from the people’s sinful, wayward heart. Any blow to the pride of the city would be likely to involve the great object of Jerusalem’s pride, the Temple (see on ch.7:4).