'Beyond the River' in the Bible

Furthermore, I hereby decree what you are to do for the Jewish leaders who are building this Temple of God: you are to pay the expenses of these men out of the king's assets from taxes collected beyond the River so that they are not hindered.

Woe to the land of whirring wings that is beyond the rivers of Cush,

"From beyond the rivers of Sudan my worshipers including my dispersed people will present offerings to me.