Jamieson, Fausset and Brown on Isaiah 50:2

2. I--Messiah.

no man--willing to believe in and obey Me (Is 52:1, 3). The same Divine Person had "come" by His prophets in the Old Testament (appealing to them, but in vain, Jr 7:25, 26), who was about to come under the New Testament.

hand shortened--the Oriental emblem of weakness, as the long stretched-out hand is of power (Is 59:1). Notwithstanding your sins, I can still "redeem" you from your bondage and dispersion.

dry up ... sea--(Ex 14:21). The second exodus shall exceed, while it resembles in wonders, the first (Is 11:11, 15; 51:15).

make ... rivers ... wilderness--turn the prosperity of Israel's foes into adversity.

fish stinketh--the very judgment inflicted on their Egyptian enemies at the first exodus (Ex 7:18, 21).