Deuteronomy 11:26

I set before you I propose them to your consideration and your choice. So that if a curse should be your portion, instead of a blessing, and you should be in a calamitous and miserable, and not in a prosperous and happy condition, you must thank yourselves for it. This he explains more at large in the 28th chapter. And the whole historical part of the Old Testament bears witness that God caused a blessing or a curse to attend them, according as they observed or broke his laws.