Deuteronomy 29:24-26

24even all nations shall say, Why has Jehovah done thus to this land? whence the heat of this great anger?

25And men shall say, Because they have forsaken the covenant of Jehovah the 1God of their fathers, which he had made with them when he brought them forth out of the land of Egypt;

26and they went and served other 2gods, and bowed down to them, 3gods whom they knew not, and whom he had not assigned to them.