Deuteronomy 28:52-53

52They will besiege you within all your city gates until your high and fortified walls, that you trust in, come down throughout your land. They will besiege you within all your city gates throughout the land the Lord your God has given you.

53“You will eat your offspring, the flesh of your sons and daughters the Lord your God has given you during the siege and hardship your enemy imposes on you.