Leviticus 26:18-20 NIV

[18] “ ‘If after all this you will not listen to me, I will punish you for your sins seven times over. [19] I will break down your stubborn pride and make the sky above you like iron and the ground beneath you like bronze. [20] Your strength will be spent in vain, because your soil will not yield its crops, nor will the trees of your land yield their fruit.