And they will have to know that I am Jehovah; not in vain did I speak about doing to them this calamitous thing.”​—Ezek. 6:8-10.

Their false gods could not save them from Jehovah’s judgment. By hard experience in the distant lands of their captors they learned that He did not speak to them in vain when he repeatedly warned them of the dire consequences of forsaking his worship.