Commentaries:
The psalmist Ethan prophesies that God "will set his hand over the sea, and his right hand over the rivers." So, Israel was to be scattered somewhere over oceans and rivers.
Charles Whitaker
Searching for Israel (Part Eight): The Scattering of Ten-Tribed Israel
Other Forerunner Commentary entries containing Psalms 89:25:
2 Kings 17:6