Leviticus 26:23-25

23The people may still not listen to God. If they do not, he will be angry.

24He will become their enemy. If they do not obey him, he will punish them seven times more strongly.

25He will send enemy soldiers to kill the people. They have not done what they promised to do. So he will punish them for that. If they go back to their cities, he will send them diseases. The enemy will win the war.