Matthew Poole and continuators on Psalms 89:25

25 I will set his hand also in the sea , and his right hand in the rivers .

i. e. Establish his power and dominion.

The midland Sea.

To wit, Euphrates, called Rivers in the Plural Number, as Nilus also is, Isai. 18. 1. Ezek. 29. 3, 4. in regard of divers branches of it and rivers which flow into it. So here is a description of the utmost bounds of the promised land, Exod. 23. 31. Numb. 34. 3. to which the Israelitish power was extended by David and Solomon.