Deuteronomy 28:52-53

52They will blockade all your cities until the high, fortified walls in which you trust come down everywhere in your land. They’ll blockade all the cities everywhere in the land that the Lord your God is giving you.

53Because of the hardships your enemies will make you suffer during the blockade, you will eat the flesh of your own children, the sons and daughters, whom the Lord your God has given you.