“But these two things will come to you in a moment in one day,
The loss of children, and widowhood.
They will come on you in their full measure,
In spite of the multitude of your sorceries,
And the great abundance of your enchantments.”
Her claims would be repudiated by events. She would lose her protector and see her children slaughtered. And this would happen in spite of all her multiplied sorceries and enchantments. And Babylon, famous for its priests, its sorcerers and its enchanters who would one day be exclusively given the name of Chaldeans (but not yet), would discover that in the end they could not save her.
‘In a moment, in one day.' When her judgment came it would come extremely quickly. And in that day she would lose everything.
‘They will come on you in their full measure.' Not just a normal defeat, but an overwhelming humiliation and end. The idea far exceeds that of Cyrus. The point all the way through is that this Babylon is an unusual case and will be dealt with unusually.