Leviticus 26:15-20

15and if you reject my decrees and abhor my laws and fail to carry out all my commands and so violate my covenant, 16then I will do this to you: I will bring on you sudden terror, wasting diseases and fever that will destroy your sight and sap your strength. You will plant seed in vain, because your enemies will eat it.

17I will set my face against you so that you will be defeated by your enemies; those who hate you will rule over you, and you will flee even when no one is pursuing you. 18“ ‘If after all this you will not listen to me, I will punish you for your sins seven times over. 19I will break down your stubborn pride and make the sky above you like iron and the ground beneath you like bronze.

20Your strength will be spent in vain, because your soil will not yield its crops, nor will the trees of your land yield their fruit.